Prevent the usage of lync clients with versions lower than specific build

1. Login to the Lync Control Panel
2. Go to Clients
3. Go to Client Version Policy Tab
4. Based on the requirement scope, you need to create a New Client Version Rule

Available Scopes:

• Global (Applies for all Lync Users)
• Site Policy (Applies to available site in the infrastructure)
• Pool Policy (Applies to available Registrar)
• User Policy (Which can be applied per User)

5. If you need to create a client version policy for a user, then Click New under Client Version Policy and click User Policy
6. Provide Name (Blocking a Lync Client Version) and Description (Block)

7. Click New Client Version Rules

8. Provide the details in the New Client Version Rule

User Agent: OC

Major Version: 15

Minor Version: 0

Build: 4420

Update: *

Comparison operation: Older than

Action: Block

9. Click Ok
10. Click Commit

11. Under Client Version Policy we will see the newly created user policy

12. Go to Users in Lync Control Panel & Click Properties and select Blocking a Lync Client Version

13. Click Commit
14. Now you have successfully applied the Client Version Policy

Note: Once User Sign Out and Sign in Back, Client Version Policy will be applied