Hello,
In your case, there are 2 steps which you would have to work on.
1) Export and Import all the policies from the older SEPM server to the Latest SEPM server. Check this Article on how to perform the actions -
How to export/import an existing Symantec Endpoint Protection policy
http://www.symantec.com/docs/TECH106486
Before importing a policy, make sure the source computer's version of Symantec Endpoint Protection matches the computer's version you are importing to.
Note: You can migrate the source computer to a newer version before exporting the policy to avoid this problem.
Reference: http://www.symantec.com/docs/TECH163090
2) To get all the 700 clients report to the new SEPM 12.1 server, you can perform either of the following steps -
SylinkReplacer Utility - This utility would assist you to replace the Sylink.xml file to all the 700 clients remotely.
OR
Perform the steps provided in the Articles below:
Restoring client-server communications with Communication Update Package Deployment
http://www.symantec.com/docs/HOWTO81109
SEP 12.1 RU2 and Reset Client Communication
https://www-secure.symantec.com/connect/articles/sep-121-ru2-and-reset-client-communication
How to point clients to a new SEPM after decommissioning or replacing the primary SEPM.
http://www.symantec.com/docs/TECH92556
SylinkReplacer for SEP 12.1 is only available with Symantec Technical Support Team.
Create a case with with Symantec Technical Support Team.
How to create a new case in MySupport
http://www.symantec.com/docs/TECH58873
Phone numbers to contact Tech Support:-
Regional Support Telephone Numbers:
- United States: https://support.broadcom.com (407-357-7600 from outside the United States)
- Australia: 1300 365510 (+61 2 8220 7111 from outside Australia)
- United Kingdom: +44 (0) 870 606 6000
Additional contact numbers: http://www.symantec.com/business/support/contact_techsupp_static.jsp
Hope that helps!!