VMM Tricks: Upgrading from Currently installed of VMM to System Center VMM 2012 is Not Supported

Some times when you try to Install/upgrade VMM 2012 “ or VMM 2012 with SP1” you get the error during install of SCVMM 2012.

“you cannot upgrade from the currently installed version of VMM to system center 2012 SP1 virtual machine manager. You must first uninstall VMM,  and then install SCVMM 2012 SP1. If you are running system center suite, when you uninstall VMM, you can retain the database. When you install System center 2012 SP1, use the retained database”

 

 

to uninstall Old VMM Server from your environment please follow these steps

Action Plan 1:

1.Backup new VMM SP1 instance.
2.Uninstall new VMM SP1 instance.
3.Uninstall old VMM SP1 instance.
4.Install new VMM SP1.

Action Plan 2:

To force an uninstall via command, please follow these steps:

1.Find VMServerUninstall.ini from folder Program Files\Microsoft System Center 2012\Virtual Machine Manager\setup.

2.Replace its content with following code:

[OPTIONS]
RemoteDatabaseImpersonation=0
RetainSqlDatabase=0
ForceHAVMMUninstall=1

If this VMM server’s SQL instance located on a remote server, please change the value of RemoteDatabaseImpersonation to 1.

3.Save this ini file to c:\temp.
4.Run command to locate the folder contain VMM Server setup file under command prompt: cd VMM_Setup_File_folder.
5.Run command to force uninstall VMM server:
setup.exe /server /x /f C:\Temp\VMServerUninstall.ini /SqlDBAdminDomain DomainName /SqlDBAdminName SQLAdmin /SqlDBAdminPassword password

Note: DomainName is your domina name “Like “Contoso or Fabrikum”
Account Domain\SQLAdmin is  an SQL Server administrator account which is used to connect to backend SQL server.