At first here is Microsoft article to install it on a 200x server.
https://technet.microsoft.com/en-us/library/cc708484(v=ws.10).aspx
About Windows Server 2012, Windows Server 2012 R2
https://technet.microsoft.com/en-us/library/cc708484(v=ws.10).aspx
After you installed wsus you set up new WSUS server be a replica of old WSUS server:
Start synchronization and download.
When it finished you need to disable synchronization:
Then you need to install on both servers this tool:
WSUS 3.0 API Samples and Tools
http://go.microsoft.com/fwlink/?LinkId=94784
http://www.microsoft.com/en-us/download/details.aspx?id=1172
- On old Server you need to go to
C:\Program Files\Update Services 3.0 API Samples and Tools\WsusMigrate\WsusMigrationExport
wsusmigrationexport.exe settings.xml
- Copy that file to new server at this path:
C:\Program Files\Update Services 3.0 API Samples and Tools\WsusMigrate\WsusMigrationImport
e dare il comando:
wsusmigrationimport.exe settings.xml All None
Then you need to recreate same settings, approval rule like old WSUS server.
[update 2015.13]
I had Drive corruption on WSUS drive where db and packages was downloaded.
It was impossible to remote WSUS and reinstall it, the only solution it was utilizing this Microsoft article
https://technet.microsoft.com/en-us/library/dd939818(v=ws.10).aspx
To uninstall Windows Internal Database
- Open a command prompt.
- Type msiexec and the following key for the operating system platform:
- For 32-bit platforms, use:
msiexec /x {CEB5780F-1A70-44A9-850F-DE6C4F6AA8FB} callerid=ocsetup.exe - For 64-bit platforms, use:
msiexec /x {BDD79957-5801-4A2D-B09E-852E7FA64D01} callerid=ocsetup.exe
- For 32-bit platforms, use:
%SystemDrive%\Program Files\Update Services\Tools\WsusUtil.exe reset
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