Administrators are encouraged to make the client upgrade process as simple as possible for end users. There are two recommended methods:
• Using System Center Configuration Manager (SCCM) to push the new client package
• Using the Client Version Policy to offer an upgrade when a user signs in with a legacy client
The Lync client can be packaged and pushed by SCCM similar to most other programs. There are no caveats other than this process also uninstalls any legacy clients, including OCS Communicator. The Client Version Policy has an option to either refer the user to a URL where the new client can be installed or to push the client directly from any web location accessible from the client. This option is configured in the Lync Server Control Panel under the Clients tab in the Client Version Policy section.
Ensure that the location chosen by the administrator is available to users both internally and externally.