SEP 12.1 clients wont move from an existing SEPM to a new SEPM with the Client Deployment Wizard (CDW) using either a Package Deployment or Communication Update Package Deployment.
The location condition type Management Server Connection and criteria If the client computer can connect to the management server causes the SEP 12.1 clients to not always move when connecting to the new SEPM.
This issue is resolved with SEP 14. SEP clients are expected to move regardless of any location condition criteria specified.
Workaround for SEP 12.1 clients:
Delete the condition type Management Server Connection and criteria If the client computer can connect to the management server from any of the client's group locations or move the client to a group that has no location condition criteria specified prior to deployment.