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Upgrading SCCM 2012 R2’s Site Server Operating System

By Garth Jones

I keep finding more System Center 2012 R2 Configuration Manager (CM12 R2) surprises!

If you recall in a blog post published in early December, I said that (unlike SQL upgrades) you “still can NOT upgrade the OS without performing a site restore.”

That is no longer true according to the latest version of the CM12 R2 documentation.

This now makes it easier than ever to upgrade the site server operating system!

Here’s what you’ll find in the documentation:

Upgrade of the Site Server Operating System

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Configuration Manager supports an in-place upgrade of the operating system of the site server in the following situations:

• In-place upgrade to a higher Windows Server service pack as long as the resulting service pack level remains supported by Configuration Manager.

• In-place upgrade from Windows Server 2012 to Windows Server 2012 R2.

Configuration Manager does not support the following Windows Server upgrade scenarios:

• Any version of Windows Server 2008 to any version of Windows Server 2008 R2 or later.

• Any version of Windows Server 2008 to any version of Windows Server 2012 or later.

• Any version of Windows Server 2008 R2 to any version of Windows Server 2012 or later.

When a direct operating system upgrade is not supported, perform one of the following procedures after you have installed the new operating system:

• Install System Center 2012 Configuration Manager with the service pack level that you want, and configure the site according to your requirements.

• Install System Center 2012 Configuration Manager with the service pack level that you want and perform a site recovery. This scenario requires you to have a site backup that was created by using the Backup Site Server maintenance task on the original Configuration Manager site, and that you use the same installation settings for the new System Center 2012 Configuration Manager site.

Windows-Server-2012