Hello,
I'm in the planning process to upgrade a SCCM 2012 sp1 on OS 2008r2 (single site).
We would like to migrate the OS from 2008r2 to 2012r2 and move SQL off box to SQL 2014. From what I've been reading I need to do a Backup and Recovery in Configuration Manager as referenced in the following links listed below.
WSUS was installed on the on the same server using sql express, non of us has access to the DB and the person that originally installed it has left the company. So I'm stuck with a dilemma.
Uninstall WSUS from the SCCM before performing a backup. On reinstall of SCCM go ahead an install WSUS as a new server.
http://blogs.msdn.com/b/scstr/archive/2014/06/13/configmgr-2012-site-recovery-scenario-stand-alone-site-server-os-or-hardware-migration-change.aspx
https://technet.microsoft.com/en-us/library/gg712697.aspx
The high levels steps
Backup Config Manager and package source location
Backup SCCM Database
Build new SQL server, reattached DB, give permissions
Build new SCCM server (same hostname, IP)
Copy package location to new sccm server
Perform a recovery of Site Server