Best method to upgrade the clients with SEP 12.1 RU2?

Check the attach Thread

https://www-secure.symantec.com/connect/forums/best-practice-upgrade-sep-11x-clients-sep-12x

Best practices for upgrading to Symantec Endpoint Protection 12.1.2

How to upgrade Symantec Endpoint Protection clients by using Auto-Upgrade

Client Deployment Wizard - SEP 12.1

https://www-secure.symantec.com/connect/articles/client-deployment-wizard-sep-121

TECH163700 is not open.

Error The SymWISE Support site is undergoing maintenance.

hello,

You can wait may be some maintenance activity are running.

May be site is unavailable due to some maintainance activity

Try it

Client Deployment Wizard - SEP 12.1

https://www-secure.symantec.com/connect/articles/client-deployment-wizard-sep-121

Hello,

You can also use the below article

https://www-secure.symantec.com/connect/articles/upgrade-clients-sep-121-auto-upgrade-feature

Thanks a lot.

Hello,

Now Symantec TECH163700 link is working, so you can use anyone.

Steps to prepare computers to install Symantec Endpoint Protection 12.1 client

http://www.symantec.com/docs/TECH163112

Symantec™ Endpoint Protection and Symantec Network Access Control 12.1.2 Client Guide