I am wanting to upgrade our SEPM from version 11.0.6200 to the latest version.  Is it possible to upgrade to the latest version (12.1.4a is this the latest version?) or do i have to upgrade in stages?

Any help on this would be appriciated

Also a link to a best practices would be greatly appriciated

Is it possible to upgrade to the latest version (12.1.4a is this the latest version?) or do i have to upgrade in stages?

SEPM 12.1.4 MP1 is latest version

Yes, you can upgrade direct SEPM 11.0.6200 to SEPM 12.1.4 MP1

Symantec Endpoint Protection 12.1.4100.4126 (RU4 MP1) can upgrade seamlessly over the following:

• Symantec Endpoint Protection 12.1.4023.4080 (RU4a)
• Symantec Endpoint Protection 12.1.4013.4013 (RU4)
• Symantec Endpoint Protection 12.1.3001.165 (RU3)
• Symantec Endpoint Protection 12.1.2100.2093 (RU2 MP1)
• Symantec Endpoint Protection 12.1.2015.2015 (RU2)
• Symantec Endpoint Protection 12.1.1101.401 (RU1 MP1)
• Symantec Endpoint Protection 12.1.1000.157 (RU1)
• Symantec Endpoint Protection 12.1.671.4971 (RTM)
• Symantec Endpoint Protection 11.x (can be upgraded to enterprise version only)
• Symantec Endpoint Protection Small Business Edition 12.0

Note: A Small Business Edition product can be upgraded to the enterprise version, but the reverse is considered a downgrade and is not supported.

http://www.symantec.com/business/support/index?page=content&id=TECH216176

Latest Symantec Endpoint Protection Release - SEP 12 RU4 MP1 (12.1.4100.4126)

https://www-secure.symantec.com/connect/blogs/latest-symantec-endpoint-protection-release-sep-12-ru4-mp1-12141004126

Hello,

Yes you can do direct upgrade. Supported SEP version for upgrade was listed on James007 post above. You can check this link for upgrade procedure.

Upgrading or migrating to Symantec Endpoint Protection 12.1.4

http://www.symantec.com/business/support/index?page=content&id=TECH211821

Best Regards,

Yep, you can go right to 12.1.4.1 (latest version)

See here:

Upgrading or migrating to Symantec Endpoint Protection 12.1.4100.4126 (RU4 MP1)

Hi,

Thank you for posting in Symantec community.

I would be glad to answer your query.

Symantec Endpoint Protection 12 RU4 MP1 is released.

This build's version is: 12.1.4100.4126

Upgrade from SEP 11.0.6200 to the latest version is supported.

Prior to upgrade I would strongly recommend to go through this article.

SEP 11.x to SEP 12.1 Upgrade process graphical overview

https://www-secure.symantec.com/connect/articles/sep-11x-sep-121-upgrade-process-graphical-overview

This is the importnat note in the shared article:

Note: The SEP 12.1 SEPM upgrade installer requires three times the current database size (sem5.db) if upgrading from pre-12.1 SEPM with the Embedded database only.

Latest release Articles:

Title: Upgrading or migrating to Symantec Endpoint Protection 12.1.4.1 (RU4 MP1)
Document ID: TECH216176
Article URL: http://www.symantec.com/docs/TECH216176  

Title: New fixes and features in Symantec Endpoint Protection 12.1.4.1 (RU4 MP1)
Document ID: TECH216262
Article URL: http://www.symantec.com/docs/TECH216262

Title: Symantec Endpoint Protection, Symantec Endpoint Protection Small Business Edition, and Symantec Network Access Control 12.1.4.1 Release Notes/What’s New
Document ID: DOC7313
Article URL: http://www.symantec.com/docs/DOC7313

Title: System Requirements for Symantec Endpoint Protection, Enterprise and Small Business Editions, and Network Access Control 12.1.4
Document ID: TECH216260
Article URL: http://www.symantec.com/docs/TECH216260

Yes you can have direct upgrade from SEPM 11.x to 12.1 RU4 MP1.

Upgrading or migrating to Symantec Endpoint Protection 12.1.4100.4126 (RU4 MP1)

Supported upgrade paths to Symantec Endpoint Protection Manager 12.1 from Symantec Endpoint Protection Manager 11.x

For the clients packages you can use auto upgrade

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

Symantec released Symantec Endpoint Protection 12.1.4.1a (12.1.4.4130). You can download this version from Symantec FileConnect.   

This release resolves the Heartbleed OpenSSL vulnerability.

Symantec Endpoint Protection 12.1.4.1a is now available

Is Symantec Endpoint Protection affected by the Heartbleed OpenSSL vulnerability (CVE-2014-0160)