OS: windows 2008 R2

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SEPM -- > 12.1 RU4 SBE (Small Business Editon)

SEPM -- > 12.1 RU6 MP3 EE (Enterprise Edition)

Download the latest version of SEPM from Symantec Fileconnect website with your Symantec serial number.

http://fileconnect.symantec.com

Double click the setup.exe

Application will detect that you have installed a version ofSEPM, and ask you to backup your database

Click “Install” after you backup your database

Popup a note that upgrade to version 12.1.6608.6300, this isthe latest version for now.

Next…….

Now , upgrade successfully.

12.1.x SBE version SEPM can easily and smoothly upgrade toEnterprise version.

Refer article:

https://support.symantec.com/en_US/article.TECH230601.html

Upgradeand migration paths

SymantecEndpoint Protection 12.1.6 can migrate seamlessly over the following:

·        Symantec Endpoint Protection 12.1.5337.5000 (RU5)

·        Symantec Endpoint Protection 12.1.4100.4126 (RU4 MP1),12.1.4104.4130 (RU4 MP1a), and 12.1.4112.4156 (RU4 MP1b)

·        Symantec Endpoint Protection 12.1.4013.4013 (RU4) and12.1.4023.4080 (RU4a)

·        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

·        Symantec EndpointProtection Small Business Edition 12.0 (the reverse is considered a downgradeand is not supported)

Supported upgrade and migration paths to Symantec EndpointProtection 12.1.x

https://support.symantec.com/en_US/article.TECH163514.html

Table: License update actions duringan upgrade