Symantec have release 12.1.6 MP1 (12.1 RU6 MP1).
This version of Symantec Endpoint Protection includes new features in the following areas:
The Symantec Endpoint Protection client adds support for Windows 10.
Symantec Endpoint Protection Manager adds database support for SQL Server 2012 SP2.
Symantec Endpoint Protection Manager adds browser support for Google Chrome through 43.0.2403.107, and for Firefox through 39.0.
Relevant information/articles for upgrade and defect fixes links are included below
http://www.symantec.com/docs/TECH231856
http://www.symantec.com/docs/TECH230601
http://www.symantec.com/docs/HOWTO119371
12.1 RU6 MP1 A
https://support.symantec.com/en_US/article.TECH231856.html#12.1.6_MP1a
Thanks very much. Appreciate the quick response!