diff --git a/source/reference/api/reverse.txt b/source/reference/api/reverse.txt
index e2923b2d3..14e57e897 100644
--- a/source/reference/api/reverse.txt
+++ b/source/reference/api/reverse.txt
@@ -174,5 +174,7 @@ Endpoint Protection
 Limitations
 ~~~~~~~~~~~
 
-The ``reverse`` endpoint does not support :ref:`filtered sync
-<c2c-filtered-sync>`.
+The ``reverse`` endpoint does not support:
+
+- :ref:`filtered sync <c2c-filtered-sync>`.
+- migrations from :ref:`pre-6.0 source clusters <c2c-older-version-support>`.
diff --git a/source/reference/api/start.txt b/source/reference/api/start.txt
index 1a2d785b2..6e7f321c6 100644
--- a/source/reference/api/start.txt
+++ b/source/reference/api/start.txt
@@ -132,6 +132,9 @@ Request Body Parameters
        original source cluster blocks writes and the destination cluster
        accepts writes.
 
+       :gold:`IMPORTANT:` If you are migrating from a pre-6.0 source cluster, 
+       you cannot set ``enableUserWriteBlocking`` to ``true``.
+
        To reverse sync, the ``enableUserWriteBlocking`` field must be set
        to ``true``. To allow the source cluster to accept writes again,
        for example after running migration tests, run the following
@@ -194,6 +197,9 @@ Request Body Parameters
          reversible sync. When you call the ``/reverse``
          endpoint it disables the verifier.
 
+       :gold:`IMPORTANT:` If you are migrating from a pre-6.0 source cluster, 
+       you cannot set ``reversible`` to ``true``.
+
        For more information, see the :ref:`reverse <c2c-api-reverse>` endpoint.
        
        Default value is ``false``.
diff --git a/source/reference/permissions.txt b/source/reference/permissions.txt
index 59727db00..0e0a35117 100644
--- a/source/reference/permissions.txt
+++ b/source/reference/permissions.txt
@@ -28,3 +28,12 @@ The Atlas permissions are:
 
 .. include:: /includes/table-permissions-atlas.rst
 
+.. _c2c-older-version-permissions:
+
+Pre-6.0 Migrations 
+------------------
+
+- When migrating from a 4.4 source cluster, you must have 
+  :authrole:`clusterManager` permissions on the source cluster.
+
+- Write blocking and reverse sync are not supported.
diff --git a/source/release-notes/1.10.txt b/source/release-notes/1.10.txt
index 5070f33d1..068b04349 100644
--- a/source/release-notes/1.10.txt
+++ b/source/release-notes/1.10.txt
@@ -19,6 +19,8 @@ Release Notes for mongosync 1.10
 This page describes changes and new features introduced in  
 {+c2c-full-product-name+} 1.10.
 
+.. _c2c-older-version-support:
+
 Older Version Support
 ---------------------
 
@@ -32,6 +34,7 @@ destination MongoDB server versions:
 To learn more, see: 
 
 - :ref:`Pre-6.0 Migration Limitations <c2c-older-version-limitations>`.
+- :ref:`Pre-6.0 Migration Permissions <c2c-older-version-permissions>`.
 - :ref:`c2c-sync-different-versions`.
 
 Minimum Supported Version
diff --git a/source/reverse-sync.txt b/source/reverse-sync.txt
index bf4a3d3c6..762f51184 100644
--- a/source/reverse-sync.txt
+++ b/source/reverse-sync.txt
@@ -35,6 +35,10 @@ following parameters:
 For more information on limitations and requirements of reversing sync,
 see :ref:`c2c-api-reverse`. 
 
+.. important:: 
+
+   If you are migrating from a pre-6.0 source cluster, you cannot reverse sync.
+
 Steps
 -----