Updates for September release of Azure Virtual Desktop agent.

Author: Heidilohr

articles/virtual-desktop/whats-new-agent.md

@@ -27,12 +27,18 @@ A rollout may take several weeks before the agent is available in all environmen
 
 | Release | Latest version |
 |--|--|
-| Production | 1.0.7033.1401 |
-| Validation | 1.0.7255.800 |
+| Production | 1.0.7255.1400 |
+| Validation | 1.0.7539.5800 |
 
 The agent is automatically installed when adding session hosts in most scenarios. If you need to download the agent, you find it at [Register session hosts to a host pool](add-session-hosts-host-pool.md#register-session-hosts-to-a-host-pool), together with the steps to install it.
 
-## Version 1.0.7255.800 (validation)
+## Version 1.0.7539.5800 (validation)
+
+This update was released at the beginning of September 2023 and includes the following changes: 
+
+- Security improvements and bug fixes. 
+
+## Version 1.0.7255.800
 
 This update was released at the end of July 2023 and includes the following changes: