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[Guide] How to Update Microsoft Lync Server evaluation version to the licensed version

To update a Lync Server from the evaluation version of Lync Server 2010 to the licensed version of the software follow below steps,
1. Log on to the Lync server as a Administrator
2. Click Start->All Programs->Microsoft Lync Server 2010-> Click on Lync Server Management shell
3. In Lync Server Management shell type the below command & press enter
msiexec.exe /fvomus server.msi EVALTOFULL=1 /qb
you might need to specify the full path to the file server.msi. This file can be found in the Setup folder of the Lync Server Volume media installation files.
4. After Setup finishes running, type below command on command prompt and then press ENTER
5. Repeat the same procedure on any other Front End Server, Director, or Edge Server running an evaluation copy of Lync Server 2010.
6. To verify the version of the Lync Server (whether evalution or licensed version of lync server is running) run below command