diff --git a/windows/client-management/mdm/new-in-windows-mdm-enrollment-management.md b/windows/client-management/mdm/new-in-windows-mdm-enrollment-management.md
index 0a50619021..bcd0ad6c0b 100644
--- a/windows/client-management/mdm/new-in-windows-mdm-enrollment-management.md
+++ b/windows/client-management/mdm/new-in-windows-mdm-enrollment-management.md
@@ -58,6 +58,7 @@ For details about Microsoft mobile device management protocols for Windows 10 s
   - [What is dmwappushsvc?](#what-is-dmwappushsvc)
 
 - **Change history in MDM documentation**
+    - [November 2019](#november-2019)
     - [October 2019](#october-2019)
     - [September 2019](#september-2019)
     - [August 2019](#august-2019)
@@ -1934,6 +1935,12 @@ How do I turn if off? | The service can be stopped from the "Services" console o
 
 ## Change history in MDM documentation
 
+### November 2019
+
+|New or updated topic | Description|
+|--- | ---|
+|[Policy CSP - DeliveryOptimization](policy-csp-deliveryoptimization.md)|Added option 5 in the supported values list for DeliveryOptimization/DOGroupIdSource.|
+
 ### October 2019
 
 |New or updated topic | Description|
diff --git a/windows/client-management/mdm/policy-csp-deliveryoptimization.md b/windows/client-management/mdm/policy-csp-deliveryoptimization.md
index 79c0298921..ad5b170144 100644
--- a/windows/client-management/mdm/policy-csp-deliveryoptimization.md
+++ b/windows/client-management/mdm/policy-csp-deliveryoptimization.md
@@ -780,7 +780,7 @@ ADMX Info:
 
 <!--/Scope-->
 <!--Description-->
-Added in Windows 10, version 1803. Set this policy to restrict peer selection to a specific source. Options available are: 1 = AD Site, 2 = Authenticated domain SID, 3 = DHCP Option ID, 4 = DNS Suffix
+Added in Windows 10, version 1803. Set this policy to restrict peer selection to a specific source. Options available are: 1 = AD Site, 2 = Authenticated domain SID, 3 = DHCP Option ID, 4 = DNS Suffix, 5 = AAD.
 
 When set, the Group ID will be assigned automatically from the selected source.
 
@@ -790,6 +790,8 @@ The options set in this policy only apply to Group (2) download mode. If Group (
 
 For option 3 - DHCP Option ID, the client will query DHCP Option ID 234 and use the returned GUID value as the Group ID.
 
+Starting with Windows 10, version 1903, you can use the Azure Active Directory (AAD) Tenant ID as a means to define groups. To do this, set the value of DOGroupIdSource to 5.
+
 <!--/Description-->
 <!--ADMXMapped-->
 ADMX Info:  
@@ -807,6 +809,7 @@ The following list shows the supported values:
 -   2 - Authenticated domain SID
 -   3 - DHCP user option
 -   4 - DNS suffix
+-   5 - AAD
 
 <!--/SupportedValues-->
 <!--/Policy-->