diff --git a/source/sdk/dotnet/realm-files/encrypt-a-realm.txt b/source/sdk/dotnet/realm-files/encrypt-a-realm.txt
index 3c1aa08461..bf23d657a8 100644
--- a/source/sdk/dotnet/realm-files/encrypt-a-realm.txt
+++ b/source/sdk/dotnet/realm-files/encrypt-a-realm.txt
@@ -28,6 +28,14 @@ integrity using a :wikipedia:`hash-based message authentication code
 
 .. include:: /includes/encrypt-use-strong-cryptographic-hash.rst
 
+.. note:: Cannot Encrypt an Existing Unencrypted Realm
+
+    You must encrypt a realm the first time you open it. 
+    If you try to open an existing unencrypted realm using a configuration
+    that contains an encryption key, Realm throws an error.
+
+    .. update with writeCopy API when available
+
 Considerations
 --------------
 
diff --git a/source/sdk/flutter/realm-database/realm-files/encrypt.txt b/source/sdk/flutter/realm-database/realm-files/encrypt.txt
index 6353445848..c0c7850e51 100644
--- a/source/sdk/flutter/realm-database/realm-files/encrypt.txt
+++ b/source/sdk/flutter/realm-database/realm-files/encrypt.txt
@@ -27,6 +27,17 @@ integrity using a :wikipedia:`hash-based message authentication code
 
 .. include:: /includes/encrypt-use-strong-cryptographic-hash.rst
 
+.. note:: Encrypt a Realm on Open or Copy Unencrypted Realm
+
+    You must encrypt a realm the first time you open it. 
+    If you try to open an existing unencrypted realm using a configuration
+    that contains an encryption key, Realm throws an error.
+
+    Alternatively, you can copy the unencrypted realm data to a new 
+    encrypted realm using the 
+    :flutter-sdk:`Realm.writeCopy() <realm/Realm/writeCopy.html>` method.
+    Refer to :ref:`<flutter-copy-data-into-new-realm>` for more information.
+
 Considerations
 --------------
 
diff --git a/source/sdk/kotlin/realm-database/realm-files/encrypt-a-realm.txt b/source/sdk/kotlin/realm-database/realm-files/encrypt-a-realm.txt
index 943a4af9f5..f0e9300c2e 100644
--- a/source/sdk/kotlin/realm-database/realm-files/encrypt-a-realm.txt
+++ b/source/sdk/kotlin/realm-database/realm-files/encrypt-a-realm.txt
@@ -12,8 +12,8 @@ Encrypt a Realm - Kotlin SDK
 
 You can encrypt your realms to ensure that the data stored to disk can't be 
 read outside of your application. You encrypt the realm file on 
-disk with AES-256 + SHA-2 by supplying a 64-byte encryption key when 
-:ref:`opening the realm <kotlin-open-and-close-a-realm>`.
+disk with AES-256 + SHA-2 by supplying a 64-byte encryption key when first
+:ref:`opening the realm <kotlin-open-and-close-a-realm>`. 
 
 Realm transparently encrypts and decrypts data with standard
 :wikipedia:`AES-256 encryption <Advanced_Encryption_Standard>` using the
@@ -24,13 +24,26 @@ integrity using a :wikipedia:`hash-based message authentication code
 
 .. include:: /includes/encrypt-use-strong-cryptographic-hash.rst
 
+.. note:: Encrypt a Realm on Open or Copy Unencrypted Realm
+
+    You must encrypt a realm the first time you open it. 
+    If you try to open an existing unencrypted realm using a configuration
+    that contains an encryption key, Realm throws an error.
+
+    Alternatively, you can copy the unencrypted realm data to a new 
+    encrypted realm using the 
+    `Realm.writeCopyTo() <{+kotlin-local-prefix+}io.realm.kotlin/-realm/write-copy-to.html>`__ 
+    method.
+    Refer to :ref:`<kotlin-copy-data-to-realm>` for more information.
+
 Encrypt a Local Realm
 ---------------------
 
 To encrypt a local realm, pass your encryption key to the
 `encryptionKey <{+kotlin-local-prefix+}io.realm.kotlin/-configuration/encryption-key.html>`__
-property in your 
-`RealmConfiguration.Builder() <{+kotlin-local-prefix+}io.realm.kotlin/-realm-configuration/index.html>`__.
+property in the 
+`RealmConfiguration.Builder() <{+kotlin-local-prefix+}io.realm.kotlin/-realm-configuration/index.html>`__
+used to open the realm. 
 
 The following code demonstrates how to generate an encryption key and
 open an encrypted local realm:
@@ -44,14 +57,15 @@ open an encrypted local realm:
 Encrypt a Synced Realm
 ----------------------
 
-You can encrypt a :ref:`synced realm <kotlin-open-a-synced-realm>`, similar
+If your app uses Atlas Device Sync, you can encrypt a synced realm, similar 
 to encrypting a local realm. 
 
 To encrypt a synced realm, pass your encryption key to the
 `encryptionKey <{+kotlin-sync-prefix+}io.realm.kotlin.mongodb/-app-configuration/encryption-key.html>`__
-property in your 
+property in the 
 `SyncConfiguration.Builder()
-<{+kotlin-sync-prefix+}io.realm.kotlin.mongodb.sync/-sync-configuration/-builder/-builder.html>`__.
+<{+kotlin-sync-prefix+}io.realm.kotlin.mongodb.sync/-sync-configuration/-builder/-builder.html>`__
+used to open the realm.
 
 The following code demonstrates how to open an encrypted synced realm:
 
@@ -59,6 +73,8 @@ The following code demonstrates how to open an encrypted synced realm:
    :language: kotlin
    :emphasize-lines: 5-6
 
+Refer to :ref:`<kotlin-open-a-synced-realm>` for more information. 
+
 Encryption and Atlas Device Sync
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -97,8 +113,8 @@ Performance Impact
 
 Reads and writes on encrypted realms can be up to 10% slower than unencrypted realms.
 
-Access Encrypted Realm from Multiple Processes
-----------------------------------------------
+Access Encrypted Realms from Multiple Processes
+-----------------------------------------------
 
 .. versionchanged:: 10.8.0
 
diff --git a/source/sdk/node/realm-files/encrypt.txt b/source/sdk/node/realm-files/encrypt.txt
index 3f3fe9c2c9..af3e38b37f 100644
--- a/source/sdk/node/realm-files/encrypt.txt
+++ b/source/sdk/node/realm-files/encrypt.txt
@@ -23,6 +23,19 @@ integrity using a :wikipedia:`hash-based message authentication code
 
 .. include:: /includes/encrypt-use-strong-cryptographic-hash.rst
 
+.. note:: Encrypt a Realm on Open or Copy Unencrypted Realm
+
+    You must encrypt a realm the first time you open it. 
+    If you try to open an existing unencrypted realm using a configuration
+    that contains an encryption key, Realm throws an error.
+
+    Alternatively, you can copy the unencrypted realm data to a new 
+    encrypted realm using the 
+    :js-sdk:`Realm.writeCopyTo() <Realm.html#writeCopyTo>`
+    method.
+    Refer to :ref:`<node-open-existing-realm-different-configuration>`
+    for more information.
+
 The following code demonstrates how to generate an encryption key and
 open an encrypted realm:
 
diff --git a/source/sdk/react-native/realm-files/encrypt.txt b/source/sdk/react-native/realm-files/encrypt.txt
index 1e1ed2af22..aaaa57807f 100644
--- a/source/sdk/react-native/realm-files/encrypt.txt
+++ b/source/sdk/react-native/realm-files/encrypt.txt
@@ -22,6 +22,14 @@ integrity using a :wikipedia:`hash-based message authentication code
 
 .. include:: /includes/encrypt-use-strong-cryptographic-hash.rst
 
+.. note:: Cannot Encrypt an Existing Unencrypted Realm
+
+    You must encrypt a realm the first time you open it. 
+    If you try to open an existing unencrypted realm using a configuration
+    that contains an encryption key, Realm throws an error.
+
+    .. update with writeCopy API info once available
+
 The following code demonstrates how to generate an encryption key and
 open an encrypted realm:
 
diff --git a/source/sdk/swift/realm-files/encrypt-a-realm.txt b/source/sdk/swift/realm-files/encrypt-a-realm.txt
index 9c5a1b832a..3b0d474296 100644
--- a/source/sdk/swift/realm-files/encrypt-a-realm.txt
+++ b/source/sdk/swift/realm-files/encrypt-a-realm.txt
@@ -26,6 +26,14 @@ integrity using a :wikipedia:`hash-based message authentication code
 
 .. include:: /includes/encrypt-use-strong-cryptographic-hash.rst
 
+.. note:: Cannot Encrypt an Existing Unencrypted Realm
+
+    You must encrypt a realm the first time you open it. 
+    If you try to open an existing unencrypted realm using a configuration
+    that contains an encryption key, Realm throws an error.
+
+    .. update with writeCopy API when available
+
 Considerations
 --------------