Hello,
Perform a Disaster Recovery for SEPM 12.1 -
Symantec Endpoint Protection 12.1: Best Practices for Disaster Recovery with the Symantec Endpoint Protection Manager
http://www.symantec.com/docs/TECH160736
OR
Uninstall and Reinstall SEPM 12.1 RU1 MP1 and then run the SylinkReplacer 12.1 to recover all the client back reporting to the SEPM.
For the new SylinkRepalcer Tool for SEP 12.1, you will have to call symantec or log a web case.
QuickStart Guide - Create and Manage Support Cases in SymWISE
http://www.symantec.com/docs/HOWTO31132
How to update a support case and upload diagnostic files with MySupport
http://www.symantec.com/docs/TECH71023
OR
Call Regional Support Telephone Numbers:
Australia: 1300 365510 (+61 2 8220 7111 from outside Australia)
United Kingdom: +44 (0) 870 606 6000
Hope that helps!!