One of the single most common errors I see with first time installers of System Centre VMM is the Fatal Error 205 and 99 times out of 100, its a very simple fix. The computer account needs to be registered in the domain using the domains FQDN (Fully Qualified Domain Name). To fix, place the VMM server into a workgroup, then re-add it to the domain – add it using the FQDN of the domain i.e. ‘VIRTUSOLVE.LOCAL’ instead of ‘VIRTUSOLVE’.
If adding to the domain using the FQDN fails you have either connectivity or DNS issues, check your IP settings and that you can ping a domain controller and you can ping the domain FQDN.