diff --git a/app/adapters/user-message.ts b/app/adapters/user-message.ts
new file mode 100644
index 00000000000..a92b865c714
--- /dev/null
+++ b/app/adapters/user-message.ts
@@ -0,0 +1,13 @@
+// app/adapters/user-message.js
+import { inject as service } from '@ember/service';
+import config from 'ember-osf-web/config/environment';
+const { OSF: { apiUrl } } = config;
+import OsfAdapter from './osf-adapter';
+
+export default class UserMessageAdapter extends OsfAdapter {
+    @service session;
+    urlForCreateRecord(modelName, snapshot) {
+        const userId = snapshot.record.user;
+        return `${apiUrl}/v2/users/${userId}/messages/`;
+    }
+}
diff --git a/app/institutions/dashboard/-components/institutional-users-list/component.ts b/app/institutions/dashboard/-components/institutional-users-list/component.ts
index 9c879700ddc..2268909b0c1 100644
--- a/app/institutions/dashboard/-components/institutional-users-list/component.ts
+++ b/app/institutions/dashboard/-components/institutional-users-list/component.ts
@@ -1,3 +1,4 @@
+import { task } from 'ember-concurrency';
 import Component from '@glimmer/component';
 import { tracked } from '@glimmer/tracking';
 import { action } from '@ember/object';
@@ -10,6 +11,7 @@ import InstitutionModel from 'ember-osf-web/models/institution';
 import InstitutionDepartmentsModel from 'ember-osf-web/models/institution-department';
 import Analytics from 'ember-osf-web/services/analytics';
 import { RelationshipWithLinks } from 'osf-api';
+import {MessageTypeChoices} from 'ember-osf-web/models/user-message';
 
 interface Column {
     key: string;
@@ -27,6 +29,8 @@ interface InstitutionalUsersListArgs {
 export default class InstitutionalUsersList extends Component<InstitutionalUsersListArgs> {
     @service analytics!: Analytics;
     @service intl!: Intl;
+    @service store;
+    @service currentUser!: CurrentUser;
 
     institution?: InstitutionModel;
 
@@ -37,6 +41,12 @@ export default class InstitutionalUsersList extends Component<InstitutionalUsers
     @tracked sort = 'user_name';
     @tracked selectedDepartments: string[] = [];
     @tracked filteredUsers = [];
+    @tracked messageModalShown = false;
+    @tracked messageText = '';
+    @tracked bcc_sender = false;
+    @tracked replyTo = false;
+    @tracked selectedUserId = null;
+    @service toast!: Toast;
 
     @tracked columns: Column[] = [
         {
@@ -262,4 +272,54 @@ export default class InstitutionalUsersList extends Component<InstitutionalUsers
     clickToggleOrcidFilter(hasOrcid: boolean) {
         this.hasOrcid = !hasOrcid;
     }
+
+    @action
+    openMessageModal(userId: string) {
+        this.selectedUserId = userId;
+        this.messageModalShown = true;
+    }
+
+    @action
+    toggleMessageModal(userId: string | null = null) {
+        this.messageModalShown = !this.messageModalShown;
+        this.selectedUserId = userId;
+        if (!this.messageModalShown) {
+            this.resetModalFields();
+        }
+    }
+
+    @action
+    resetModalFields() {
+        this.messageText = '';
+        this.bcc_sender = false;
+        this.replyTo = false;
+        this.selectedUserId = null;
+    }
+
+    @task
+    @waitFor
+    async sendMessage() {
+        if (!this.messageText.trim()) {
+            this.toast.error(this.intl.t('error.empty_message'));
+            return;
+        }
+
+        try {
+            const userMessage = this.store.createRecord('user-message', {
+                messageText: this.messageText.trim(),
+                messageType: MessageTypeChoices.InstitutionalRequest,
+                bcc_sender: this.bcc_sender,
+                replyTo: this.replyTo,
+                institution: this.args.institution,
+                user: this.selectedUserId,
+            });
+
+            await userMessage.save();
+            this.toast.success(this.intl.t('institutions.dashboard.send_message_modal.message_sent_success'));
+        } catch (error) {
+            this.toast.error(this.intl.t('institutions.dashboard.send_message_modal.message_sent_failed'));
+        } finally {
+            this.messageModalShown = false;
+        }
+    }
 }
diff --git a/app/institutions/dashboard/-components/institutional-users-list/styles.scss b/app/institutions/dashboard/-components/institutional-users-list/styles.scss
index d932f66a6f3..c68eeb9db69 100644
--- a/app/institutions/dashboard/-components/institutional-users-list/styles.scss
+++ b/app/institutions/dashboard/-components/institutional-users-list/styles.scss
@@ -319,3 +319,41 @@ input:checked + .slider::before {
     justify-content: flex-end;
     margin-right: 15px;
 }
+
+
+.icon-message {
+    opacity: 0;
+    color: $color-text-blue-dark;
+    /* !important used to override ember Button border scripting  */
+    background-color: inherit !important;
+    border: 0 !important;
+    box-shadow: 0 !important;
+}
+
+.icon-message:hover {
+    opacity: 1;
+    background-color: inherit !important;
+}
+
+.message-textarea {
+    min-width: 450px;
+    min-height: 280px;
+}
+
+.message-label {
+    display: block;
+}
+
+.checkbox-container {
+    display: flex;
+    flex-direction: column;
+    gap: 10px;
+    padding: 10px;
+}
+
+.checkbox-item {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    font-size: 14px;
+}
diff --git a/app/institutions/dashboard/-components/institutional-users-list/template.hbs b/app/institutions/dashboard/-components/institutional-users-list/template.hbs
index b9488e01a66..a049ed56f45 100644
--- a/app/institutions/dashboard/-components/institutional-users-list/template.hbs
+++ b/app/institutions/dashboard/-components/institutional-users-list/template.hbs
@@ -175,6 +175,14 @@
                             <OsfLink @href={{concat '/' institutionalUser.userGuid '/'}}>
                                 {{institutionalUser.userName}}
                             </OsfLink>
+                            <Button
+                                local-class='icon-message'
+                                aria-label={{t 'institutions.dashboard.send_message_modal.open_aira_label'}}
+
+                                {{on 'click' (fn this.openMessageModal institutionalUser.userGuid)}}
+                            >
+                                <FaIcon @icon='comment' />
+                            </Button>
                         {{else if (eq column.type 'osf_link')}}
                             <OsfLink @href={{concat '/' institutionalUser.userGuid '/'}}>
                                 {{institutionalUser.userGuid}}
@@ -204,4 +212,50 @@
             {{t 'institutions.dashboard.users_list.empty'}}
         </list.empty>
     </PaginatedList::HasMany>
+    <OsfDialog @isOpen={{this.messageModalShown}} @onClose={{this.toggleMessageModal}} as |dialog|>
+        <dialog.heading>
+            {{t 'institutions.dashboard.send_message_modal.title'}}
+        </dialog.heading>
+        <dialog.main>
+            <div>
+                <label for='message-text' local-class='message-label'>
+                    {{t 'institutions.dashboard.send_message_modal.opening_message_label'}}
+                </label>
+                <Textarea
+                  id='message-text'
+                  local-class='message-textarea'
+                  @value={{this.messageText}}
+                />
+                <div>
+                    {{t 'institutions.dashboard.send_message_modal.closing_message_label' adminName=this.currentUser.user.fullName htmlSafe=true}}
+                </div>
+                <div local-class='checkbox-container'>
+                    <label local-class='checkbox-item'>
+                        <Input @type='checkbox' @checked={{this.bcc_sender}} />
+                        {{t 'institutions.dashboard.send_message_modal.cc_label'}}
+                    </label>
+                    <label local-class='checkbox-item'>
+                        <Input @type='checkbox' @checked={{this.replyTo}} />
+                        {{t 'institutions.dashboard.send_message_modal.reply_to_label'}}
+                    </label>
+                </div>
+            </div>
+        </dialog.main>
+        <dialog.footer>
+            <Button
+                @type='secondary'
+                {{on 'click' this.toggleMessageModal}}
+            >
+                {{t 'general.cancel'}}
+            </Button>
+            <Button
+                @type='primary'
+                @disabled={{not this.messageText.trim}}
+                {{on 'click' (queue (perform this.sendMessage))}}
+
+            >
+                {{t 'institutions.dashboard.send_message_modal.send'}}
+            </Button>
+        </dialog.footer>
+    </OsfDialog>
 {{/if}}
diff --git a/app/models/user-message.ts b/app/models/user-message.ts
new file mode 100644
index 00000000000..9e66b3fa8fb
--- /dev/null
+++ b/app/models/user-message.ts
@@ -0,0 +1,15 @@
+// app/models/user-message.js
+import Model, { attr, belongsTo } from '@ember-data/model';
+
+export enum MessageTypeChoices {
+    InstitutionalRequest = 'institutional_request',
+}
+
+
+export default class UserMessageModel extends Model {
+  @attr('string') messageText;
+  @attr('string') messageType: MessageTypeChoices;
+  @attr('boolean') bcc_sender;
+  @attr('boolean') replyTo;
+  @belongsTo('institution') institution;
+}
diff --git a/translations/en-us.yml b/translations/en-us.yml
index 79d39529dd6..922deb56745 100644
--- a/translations/en-us.yml
+++ b/translations/en-us.yml
@@ -799,6 +799,18 @@ institutions:
     search_placeholder: 'Search institutions'
     load_more: 'Load more institutions'
     dashboard:
+        send_message_modal:
+          open_aira_label: 'Open User Message Modal Button'
+          close_aira_label: 'Close User Message Modal Button'
+          send_aira_label: 'Send User Message Button'
+          title: 'Send Email'
+          opening_message_label: 'Comments:'
+          closing_message_label: 'Sincerely Yours,<br> {adminName}'
+          message_sent_success: 'Message has been sent'
+          message_sent_failed: 'Message has failed to send. If the issue persists contact your administrator'
+          send: 'Send'
+          cc_label: 'CC sender'
+          reply_to_label: 'Allow reply to sender address'
         tabs:
             summary: Summary
             users: Users