Add November 2025 what's new entry for ServiceNow OAuth support

Author: DebLanger

exposure-management/whats-new.md

@@ -24,6 +24,14 @@ Learn more about MSEM by reading the blogs, [here](https://techcommunity.microso
 >
 > `https://aka.ms/msem/rss`
 
+## November 2025
+
+### ServiceNow connector OAuth 2.0 authentication support
+
+The ServiceNow data connector now supports OAuth 2.0 authentication in addition to Basic Authentication. This enhancement allows organizations to use modern authentication standards with client credentials flow, providing improved security through easier credential rotation and scoped authentication based on OAuth Application User roles.
+
+For more information, see [ServiceNow data connector](ServiceNow-data-connector.md).
+
 ## September 2025
 
 ### New data connectors