diff --git a/perun-base/src/test/resources/perun-apps-config.yml b/perun-base/src/test/resources/perun-apps-config.yml
index 3a6219aa21..83c7d7a1ec 100644
--- a/perun-base/src/test/resources/perun-apps-config.yml
+++ b/perun-base/src/test/resources/perun-apps-config.yml
@@ -10,14 +10,16 @@ brands:
       pwd_reset: "pwd-reset"
       publications: "publications"
     old_gui_domain: "perun-dev"
+    old_gui_alert: New GUI is <b><a href="http://www.google.com">here</a></b>
   - name: other
     new_apps:
-      api: ""
-      admin: ""
-      consolidator: ""
-      linker: ""
-      profile: ""
-      pwd_reset: ""
-      publications: ""
-    old_gui_domain: ""
+      api: "other-api"
+      admin: "other-admin"
+      consolidator: "other-consolidator"
+      linker: "other-linker"
+      profile: "other-profile"
+      pwd_reset: "other-pwd-reset"
+      publications: "other-publication"
+    old_gui_domain: "other-old_gui_domain"
+    vos: ["test_vo", "other_vo"]
 ...
\ No newline at end of file
diff --git a/perun-core/src/main/java/cz/metacentrum/perun/core/impl/PerunAppsConfig.java b/perun-core/src/main/java/cz/metacentrum/perun/core/impl/PerunAppsConfig.java
index 5ee743e94f..949238f0ad 100644
--- a/perun-core/src/main/java/cz/metacentrum/perun/core/impl/PerunAppsConfig.java
+++ b/perun-core/src/main/java/cz/metacentrum/perun/core/impl/PerunAppsConfig.java
@@ -3,6 +3,7 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
 
+import java.util.ArrayList;
 import java.util.List;
 
 /**
@@ -52,16 +53,32 @@ public static Brand getBrandContainingDomain(String domain) {
 		return null;
 	}
 
+	/**
+	 * Iterates brands and searches for such that contains vo's shortname.
+	 * If none found, returns default branding.
+	 */
+	public static Brand getBrandContainingVo(String voShortname) {
+		Brand defaultBrand = instance.getBrands()
+			.stream()
+			.filter(brand -> brand.getName().equals("default"))
+			.findFirst()
+			.orElse(null);
+		return instance.getBrands().stream()
+			.filter(brand -> brand.getVoShortnames().contains(voShortname))
+			.findFirst()
+			.orElse(defaultBrand);
+	}
+
 	/**
 	 * Class holding data for a single branding.
 	 */
 	public static class Brand {
 
 		private String name;
-
 		private String oldGuiDomain;
-
 		private NewApps newApps;
+		private List<String> voShortnames = new ArrayList<>();
+		private String oldGuiAlert;
 
 		@JsonGetter("name")
 		public String getName() {
@@ -83,6 +100,26 @@ public void setNewApps(NewApps newApps) {
 			this.newApps = newApps;
 		}
 
+		@JsonGetter("voShortnames")
+		public List<String> getVoShortnames() {
+			return voShortnames;
+		}
+
+		@JsonSetter("vos")
+		public void setVoShortnames(List<String> voShortnames) {
+			this.voShortnames = voShortnames;
+		}
+
+		@JsonGetter("oldGuiAlert")
+		public String getOldGuiAlert() {
+			return oldGuiAlert;
+		}
+
+		@JsonSetter("old_gui_alert")
+		public void setOldGuiAlert(String oldGuiAlert) {
+			this.oldGuiAlert = oldGuiAlert;
+		}
+
 		@JsonGetter("oldGuiDomain")
 		public String getOldGuiDomain() {
 			return oldGuiDomain;
@@ -98,7 +135,9 @@ public String toString() {
 			return "Brand{" +
 					"name='" + name + '\'' +
 					", oldGuiDomain='" + oldGuiDomain + '\'' +
+					", oldGuiAlert='" + oldGuiAlert + '\'' +
 					", newApps=" + newApps +
+					", vos=" + voShortnames +
 					'}';
 		}
 	}
diff --git a/perun-core/src/main/java/cz/metacentrum/perun/core/impl/Utils.java b/perun-core/src/main/java/cz/metacentrum/perun/core/impl/Utils.java
index 46d6c632fb..59f4333542 100644
--- a/perun-core/src/main/java/cz/metacentrum/perun/core/impl/Utils.java
+++ b/perun-core/src/main/java/cz/metacentrum/perun/core/impl/Utils.java
@@ -1161,8 +1161,11 @@ public static void sendPasswordResetEmail(User user, String email, String namesp
 				}
 			} else {
 				// if no brand contains specified domain, set default old gui domain
-				brand = getInstance().getBrands().get(0);
-				url = brand.getOldGuiDomain();
+				PerunAppsConfig.Brand defaultBrand = getInstance().getBrands().stream()
+					.filter(b -> b.getName().equals("default"))
+					.findFirst()
+					.orElseThrow(() -> new InternalErrorException("Default GUI branding configuration is missing"));
+				url = defaultBrand.getOldGuiDomain();
 			}
 		} catch (MalformedURLException ex) {
 			throw new InternalErrorException("Not valid URL of running Perun instance.", ex);
diff --git a/perun-core/src/test/java/cz/metacentrum/perun/core/impl/PerunAppsConfigLoaderTest.java b/perun-core/src/test/java/cz/metacentrum/perun/core/impl/PerunAppsConfigLoaderTest.java
index 7de1a10bca..f880b93c75 100644
--- a/perun-core/src/test/java/cz/metacentrum/perun/core/impl/PerunAppsConfigLoaderTest.java
+++ b/perun-core/src/test/java/cz/metacentrum/perun/core/impl/PerunAppsConfigLoaderTest.java
@@ -4,6 +4,8 @@
 import org.junit.Before;
 import org.junit.Test;
 
+import java.util.List;
+
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
@@ -18,6 +20,7 @@ public void setUp() {
 		expectedDefaultBrand = new PerunAppsConfig.Brand();
 		expectedDefaultBrand.setOldGuiDomain("perun-dev");
 		expectedDefaultBrand.setName("default");
+		expectedDefaultBrand.setOldGuiAlert("New GUI is <b><a href=\"http://www.google.com\">here</a></b>");
 
 		var newApps = new PerunAppsConfig.NewApps();
 		newApps.setApi("api");
@@ -42,5 +45,20 @@ public void init() {
 		assertThat(config.getBrands().get(0))
 				.usingRecursiveComparison()
 				.isEqualTo(expectedDefaultBrand);
+		assertThat(config.getBrands().get(1).getOldGuiAlert())
+			.isNull();
+	}
+
+	@Test
+	public void vos() {
+		PerunAppsConfig config = PerunAppsConfig.getInstance();
+
+		assertThat(config)
+			.isNotNull();
+		assertThat(config.getBrands())
+			.hasSize(2);
+		assertThat(config.getBrands().get(1).getVoShortnames())
+			.containsAll(List.of("test_vo", "other_vo"));
+		assertThat(config.getBrands().get(0).getVoShortnames()).isNullOrEmpty();
 	}
 }
diff --git a/perun-openapi/openapi.yml b/perun-openapi/openapi.yml
index 70b92d21c0..d40c59f2f5 100644
--- a/perun-openapi/openapi.yml
+++ b/perun-openapi/openapi.yml
@@ -1431,6 +1431,8 @@ components:
         name: { type: string }
         oldGuiDomain: { type: string }
         newApps: { $ref: '#/components/schemas/NewApps' }
+        vos: { type: array, items: { type: string } }
+        oldGuiAlert: { type: string }
 
     PerunAppsConfig:
       type: object
@@ -3537,6 +3539,19 @@ paths:
         default:
           $ref: '#/components/responses/ExceptionResponse'
 
+  /json/utils/getNewGuiAlert:
+    get:
+      tags:
+        - Utils
+      operationId: getNewGuiAlert
+      summary: Gets new GUI alert (banner html content) for the brand of incoming request.
+      description: Returns new GUI alert
+      responses:
+        '200':
+          $ref: '#/components/responses/StringResponse'
+        default:
+          $ref: '#/components/responses/ExceptionResponse'
+
   #################################################
   #                                               #
   # AuthzResolver                                 #
diff --git a/perun-registrar-lib/src/main/java/cz/metacentrum/perun/registrar/impl/MailManagerImpl.java b/perun-registrar-lib/src/main/java/cz/metacentrum/perun/registrar/impl/MailManagerImpl.java
index 755ec8c4d7..7568be03c4 100644
--- a/perun-registrar-lib/src/main/java/cz/metacentrum/perun/registrar/impl/MailManagerImpl.java
+++ b/perun-registrar-lib/src/main/java/cz/metacentrum/perun/registrar/impl/MailManagerImpl.java
@@ -35,6 +35,7 @@
 import cz.metacentrum.perun.core.bl.MembersManagerBl;
 import cz.metacentrum.perun.core.bl.UsersManagerBl;
 import cz.metacentrum.perun.core.blImpl.AuthzResolverBlImpl;
+import cz.metacentrum.perun.core.impl.PerunAppsConfig;
 import cz.metacentrum.perun.registrar.exceptions.ApplicationMailAlreadyRemovedException;
 import cz.metacentrum.perun.registrar.exceptions.ApplicationMailExistsException;
 import cz.metacentrum.perun.registrar.exceptions.ApplicationMailNotExistsException;
@@ -1525,8 +1526,8 @@ private String substituteCommonStrings(Application app, List<ApplicationFormItem
 
 	/**
 	 * Return base URL of Perun instance taken from VO/Group attribute. If not set,
-	 * value of config property "perunUrl" is used. If can't determine, then empty
-	 * string is returned.
+	 * value of branded, old gui domain is used. Otherwise, value of config property "perunUrl" is used.
+	 * If can't determine, then empty string is returned.
 	 *
 	 * e.g. https://perun.cesnet.cz
 	 *
@@ -1536,6 +1537,11 @@ private String substituteCommonStrings(Application app, List<ApplicationFormItem
 	 */
 	private String getPerunUrl(Vo vo, Group group) {
 		String result = getPropertyFromConfiguration("perunUrl");
+
+		PerunAppsConfig.Brand voBrand = PerunAppsConfig.getBrandContainingVo(vo.getShortName());
+		if (voBrand != null && !voBrand.getName().equals("default")) {
+			result = voBrand.getOldGuiDomain();
+		}
 		try {
 			if (group != null) {
 				Attribute a = attrManager.getAttribute(registrarSession, group, URN_GROUP_REGISTRAR_URL);
@@ -1595,10 +1601,14 @@ private String replacePerunGuiUrl(String mailText, Vo vo, Group group) {
 					// only namespace "fed", "cert",...
 					String namespace = m2.group(1);
 
-					newValue = getPerunUrl(vo, group);
-					if (newValue != null && !newValue.isEmpty()) {
-						if (!newValue.endsWith("/")) newValue += "/";
-						newValue += namespace + "/gui/";
+					if (namespace.equals("newGUI")) {
+						newValue = PerunAppsConfig.getBrandContainingVo(vo.getShortName()).getNewApps().getAdmin();
+					} else {
+						newValue = getPerunUrl(vo, group);
+						if (newValue != null && !newValue.isEmpty()) {
+							if (!newValue.endsWith("/")) newValue += "/";
+							newValue += namespace + "/gui/";
+						}
 					}
 				}
 				// substitute {appGuiUrl-authz} with actual value or empty string
@@ -1699,14 +1709,23 @@ private String replaceAppDetailUrl(String mailText, int appId, Vo vo, Group grou
 					// only namespace "fed", "cert",...
 					String namespace = m2.group(1);
 
-					newValue = getPerunUrl(vo, group);
-					if (newValue != null && !newValue.isEmpty()) {
-						if (!newValue.endsWith("/")) newValue += "/";
-						newValue += namespace + "/gui/";
-						newValue += "?vo/appdetail?id="+appId;
-						//newValue += getFedAuthz().contains(namespace) ? "?vo/appdetail?id="+appId : "#vo/appdetail?id="+appId;
+					if (namespace.equals("newGUI")) {
+						newValue = PerunAppsConfig.getBrandContainingVo(vo.getShortName()).getNewApps().getAdmin();
+						if (newValue != null && !newValue.isEmpty()) {
+							if (!newValue.endsWith("/")) newValue += "/";
+							newValue += "organizations/" + vo.getId();
+							newValue += group == null ? "" : "/groups/" + group.getId();
+							newValue += "/applications/" + appId;
+						}
+					} else {
+						newValue = getPerunUrl(vo, group);
+						if (newValue != null && !newValue.isEmpty()) {
+							if (!newValue.endsWith("/")) newValue += "/";
+							newValue += namespace + "/gui/";
+							newValue += "?vo/appdetail?id="+appId;
+							//newValue += getFedAuthz().contains(namespace) ? "?vo/appdetail?id="+appId : "#vo/appdetail?id="+appId;
+						}
 					}
-
 				}
 
 				// substitute {appDetailUrl-authz} with actual value or empty string
diff --git a/perun-rpc/src/main/java/cz/metacentrum/perun/rpc/Api.java b/perun-rpc/src/main/java/cz/metacentrum/perun/rpc/Api.java
index 9a0ed732b1..7cfe201fd5 100644
--- a/perun-rpc/src/main/java/cz/metacentrum/perun/rpc/Api.java
+++ b/perun-rpc/src/main/java/cz/metacentrum/perun/rpc/Api.java
@@ -662,6 +662,18 @@ private void serve(HttpServletRequest req, HttpServletResponse resp, boolean isG
 				out.close();
 				return;
 
+			} else if ("utils".equals(manager) && "getNewGuiAlert".equals(method)) {
+
+				String requestDomain = req.getScheme() + "://" + req.getServerName();
+				if (PerunAppsConfig.getBrandContainingDomain(requestDomain) == null) {
+					ser.write(null);
+				} else {
+					ser.write(PerunAppsConfig.getBrandContainingDomain(requestDomain).getOldGuiAlert());
+				}
+				// closes the request
+				out.close();
+				return;
+
 			} else if ("utils".equals(manager) && PERUNSTATUS.equals(method)) {
 				Date date = new Date();
 				Timestamp timestamp = new Timestamp(date.getTime());
diff --git a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/client/PerunWebSession.java b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/client/PerunWebSession.java
index 6ac84b20d5..8a7b615fa9 100644
--- a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/client/PerunWebSession.java
+++ b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/client/PerunWebSession.java
@@ -79,6 +79,7 @@ public class PerunWebSession {
 	private ArrayList<GeneralObject> entitiesHistoryList = new ArrayList<GeneralObject>();
 
 	private BasicOverlayType configuration;
+	private String newGuiAlert;
 
 	// RPC URL
 	private String rpcUrl = "";
@@ -886,4 +887,12 @@ public BasicOverlayType getConfiguration() {
 	public void setConfiguration(BasicOverlayType configuration) {
 		this.configuration = configuration;
 	}
+
+	public String getNewGuiAlert() {
+		return newGuiAlert;
+	}
+
+	public void setNewGuiAlert(String newGuiAlert) {
+		this.newGuiAlert = newGuiAlert;
+	}
 }
diff --git a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/client/WebGui.java b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/client/WebGui.java
index db6e85e34e..35b75320ee 100644
--- a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/client/WebGui.java
+++ b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/client/WebGui.java
@@ -20,6 +20,7 @@
 import cz.metacentrum.perun.webgui.client.resources.LargeIcons;
 import cz.metacentrum.perun.webgui.client.resources.SmallIcons;
 import cz.metacentrum.perun.webgui.json.GetGuiConfiguration;
+import cz.metacentrum.perun.webgui.json.GetNewGuiAlert;
 import cz.metacentrum.perun.webgui.json.JsonCallbackEvents;
 import cz.metacentrum.perun.webgui.json.JsonUtils;
 import cz.metacentrum.perun.webgui.json.attributesManager.GetListOfAttributes;
@@ -44,10 +45,14 @@
 import cz.metacentrum.perun.webgui.widgets.CantLogAsServiceUserWidget;
 import cz.metacentrum.perun.webgui.widgets.Confirm;
 import cz.metacentrum.perun.webgui.widgets.NotUserOfPerunWidget;
+import org.eclipse.jetty.util.ajax.JSON;
 
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 /**
  * The main web GUI class. It's GWT Entry point.
@@ -168,17 +173,27 @@ public void onFinished(JavaScriptObject jso) {
 				final PerunPrincipal pp = (PerunPrincipal)jso;
 				session.setPerunPrincipal(pp);
 
-				GetGuiConfiguration getConfig = new GetGuiConfiguration(new JsonCallbackEvents(){
+				GetNewGuiAlert getNewGuiAlert = new GetNewGuiAlert(new JsonCallbackEvents() {
 					@Override
 					public void onFinished(JavaScriptObject jso) {
+						BasicOverlayType basic = (jso == null) ? null : jso.cast();
+						String alert = (basic == null) ? null : basic.getString();
+						session.setNewGuiAlert(alert);
 
-						session.setConfiguration((BasicOverlayType)jso.cast());
-
-						String newGuiAlertContent = session.getConfiguration().getCustomProperty("newAdminGuiAlert");
+						String newGuiAlertContent = session.getNewGuiAlert();
 						if (newGuiAlertContent != null && !newGuiAlertContent.isEmpty()) {
-							DOM.getElementById("perun-new-gui-alert").setInnerHTML(newGuiAlertContent);
+							DOM.getElementById("perun-new-gui-alert").setInnerHTML(session.getNewGuiAlert());
 							DOM.getElementById("perun-new-gui-alert").setClassName("newGuiAlertActive");
 						}
+					}
+				});
+				getNewGuiAlert.retrieveData();
+
+				GetGuiConfiguration getConfig = new GetGuiConfiguration(new JsonCallbackEvents(){
+					@Override
+					public void onFinished(JavaScriptObject jso) {
+
+						session.setConfiguration((BasicOverlayType)jso.cast());
 
 						// check if user exists
 						if (session.getUser() == null && !pp.getRoles().hasAnyRole()) {
diff --git a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/json/GetNewGuiAlert.java b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/json/GetNewGuiAlert.java
new file mode 100644
index 0000000000..52968ab19c
--- /dev/null
+++ b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/json/GetNewGuiAlert.java
@@ -0,0 +1,58 @@
+package cz.metacentrum.perun.webgui.json;
+
+import com.google.gwt.core.client.JavaScriptObject;
+import cz.metacentrum.perun.webgui.client.PerunWebSession;
+import cz.metacentrum.perun.webgui.model.PerunError;
+
+/**
+ * Class to get new GUI alert
+ */
+public class GetNewGuiAlert implements JsonCallback {
+
+	// SESSION
+	private PerunWebSession session = PerunWebSession.getInstance();
+
+	// PARAMS
+	private JsonCallbackEvents events = new JsonCallbackEvents();
+
+	// URLs
+	static private final String URL = "utils/getNewGuiAlert";
+
+	/**
+	 * New callback instance
+	 */
+	public GetNewGuiAlert() {}
+
+	/**
+	 * New callback instance
+	 */
+	public GetNewGuiAlert(JsonCallbackEvents events) {
+		this.events = events;
+	}
+
+	@Override
+	public void retrieveData() {
+
+		JsonClient js = new JsonClient();
+		js.retrieveData(URL, this);
+
+	}
+
+	@Override
+	public void onFinished(JavaScriptObject jso) {
+		session.getUiElements().setLogText("Loading new GUI alert finished.");
+		events.onFinished(jso);
+	}
+
+	@Override
+	public void onError(PerunError error) {
+		session.getUiElements().setLogErrorText("Error while loading new GUI alert.");
+		events.onError(error);
+	}
+
+	@Override
+	public void onLoadingStart() {
+		events.onLoadingStart();
+	}
+
+}
diff --git a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/attributestabs/AttributeDefinitionDetailTabItem.java b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/attributestabs/AttributeDefinitionDetailTabItem.java
index ce591b68db..398595df0d 100644
--- a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/attributestabs/AttributeDefinitionDetailTabItem.java
+++ b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/attributestabs/AttributeDefinitionDetailTabItem.java
@@ -223,9 +223,11 @@ public void onClick(ClickEvent event) {
 		for (int i=0; i<attributeDetailTable.getRowCount(); i++) {
 			attributeDetailTable.getFlexCellFormatter().setStyleName(i, 0, "itemName");
 		}
-		String newGuiAlertContent = session.getConfiguration().getCustomProperty("newAdminGuiAlert");
+		String newGuiAlertContent = session.getNewGuiAlert();
 		final FlexTable alert = new FlexTable();
-		alert.setHTML(0,0,"<p>Setting attribute rights is no longer supported in this GUI. In order to set attribute rights please use the New GUI.</p> " + newGuiAlertContent);
+		String alertText = "<p>Setting attribute rights is no longer supported in this GUI. In order to set attribute rights please use the New GUI.</p> ";
+		if (newGuiAlertContent != null && !newGuiAlertContent.isEmpty()) alertText += newGuiAlertContent;
+		alert.setHTML(0,0, alertText);
 
 		TabMenu menu = new TabMenu();
 		menu.addWidget(UiElements.getRefreshButton(this));
diff --git a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/attributestabs/CreateAttributeDefinitionTabItem.java b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/attributestabs/CreateAttributeDefinitionTabItem.java
index 4f5255f494..57a373be25 100644
--- a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/attributestabs/CreateAttributeDefinitionTabItem.java
+++ b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/attributestabs/CreateAttributeDefinitionTabItem.java
@@ -221,9 +221,11 @@ public void onClick(ClickEvent clickEvent) {
 			}
 		}));
 
-		String newGuiAlertContent = session.getConfiguration().getCustomProperty("newAdminGuiAlert");
+		String newGuiAlertContent = session.getNewGuiAlert();
 		final FlexTable alert = new FlexTable();
-		alert.setHTML(0,0,"<p>Setting attribute rights is no longer supported in this GUI. In order to set attribute rights please use the New GUI.</p> "+ newGuiAlertContent);
+		String alertText = "<p>Setting attribute rights is no longer supported in this GUI. In order to set attribute rights please use the New GUI.</p> ";
+		if (newGuiAlertContent != null && !newGuiAlertContent.isEmpty()) alertText += newGuiAlertContent;
+		alert.setHTML(0,0,alertText);
 
 		vp.add(layout);
 		vp.add(alert);
diff --git a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/entitylessattributestabs/EntitylessAttributesDetailTabItem.java b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/entitylessattributestabs/EntitylessAttributesDetailTabItem.java
index 55361b1d53..df4697d20c 100644
--- a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/entitylessattributestabs/EntitylessAttributesDetailTabItem.java
+++ b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/entitylessattributestabs/EntitylessAttributesDetailTabItem.java
@@ -202,9 +202,11 @@ public void onLoadingStart() {
 		showKeys.addClickHandler(clickEvent -> session.getTabManager().addTab(new EntitylessAttributeEditKeyTabItem(def)));
 		menu.addWidget(showKeys);
 
-		String newGuiAlertContent = session.getConfiguration().getCustomProperty("newAdminGuiAlert");
+		String newGuiAlertContent = session.getNewGuiAlert();
 		final FlexTable alert = new FlexTable();
-		alert.setHTML(0,0,"<p>Setting attribute rights is no longer supported in this GUI. In order to set attribute rights please use the New GUI.</p> " + newGuiAlertContent);
+		String alertText = "<p>Setting attribute rights is no longer supported in this GUI. In order to set attribute rights please use the New GUI.</p> ";
+		if (newGuiAlertContent != null && !newGuiAlertContent.isEmpty()) alertText += newGuiAlertContent;
+		alert.setHTML(0,0,alertText);
 
 		// create new instance for jsonCall
 		final GetServicesByAttrDefinition services = new GetServicesByAttrDefinition(def.getId());
diff --git a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/registrartabs/CreateMailTabItem.java b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/registrartabs/CreateMailTabItem.java
index dd671b63db..d9be0f64c4 100644
--- a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/registrartabs/CreateMailTabItem.java
+++ b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/registrartabs/CreateMailTabItem.java
@@ -371,6 +371,7 @@ private Widget availableTagsTab() {
 				"<p><strong>{appDetailUrl-krb}</strong> - link for Kerberos authentication" +
 				"<br/><strong>{appDetailUrl-fed}</strong> - link for Shibboleth IdP (federation) authentication" +
 				"<br/><strong>{appDetailUrl-cert}</strong> - link for personal certificate authentication" +
+				"<br/><strong>{appDetailUrl-newGUI}</strong> - link for new admin GUI" +
 
 				"<p><strong><u>Perun GUI links for administrators:</u></strong>" +
 
@@ -382,6 +383,7 @@ private Widget availableTagsTab() {
 				"<p><strong>{perunGuiUrl-krb}</strong> - link for Kerberos authentication" +
 				"<br/><strong>{perunGuiUrl-fed}</strong> - link for Shibboleth IdP (federation) authentication" +
 				"<br/><strong>{perunGuiUrl-cert}</strong> - link for personal certificate authentication" +
+				"<br/><strong>{perunGuiUrl-newGUI}</strong> - link for new admin GUI" +
 
 				"<p><strong><u>User invitations:</u></strong>" +
 
diff --git a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/registrartabs/EditMailTabItem.java b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/registrartabs/EditMailTabItem.java
index 1269179591..268944ce10 100644
--- a/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/registrartabs/EditMailTabItem.java
+++ b/perun-web-gui/src/main/java/cz/metacentrum/perun/webgui/tabs/registrartabs/EditMailTabItem.java
@@ -306,6 +306,7 @@ private Widget availableTagsTab() {
 				"<p><strong>{appDetailUrl-krb}</strong> - link for Kerberos authentication" +
 				"<br/><strong>{appDetailUrl-fed}</strong> - link for Shibboleth IdP (federation) authentication" +
 				"<br/><strong>{appDetailUrl-cert}</strong> - link for personal certificate authentication" +
+				"<br/><strong>{appDetailUrl-newGUI}</strong> - link for new admin GUI" +
 
 				"<p><strong><u>Perun GUI links for administrators:</u></strong>" +
 
@@ -317,6 +318,7 @@ private Widget availableTagsTab() {
 				"<p><strong>{perunGuiUrl-krb}</strong> - link for Kerberos authentication" +
 				"<br/><strong>{perunGuiUrl-fed}</strong> - link for Shibboleth IdP (federation) authentication" +
 				"<br/><strong>{perunGuiUrl-cert}</strong> - link for personal certificate authentication" +
+				"<br/><strong>{perunGuiUrl-newGUI}</strong> - link for new admin GUI" +
 
 				"<p><strong><u>User invitations:</u></strong>" +