Exchange 2010 and Hosted Exchange hybrid EMC initialization fails

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http://serverfault.com – I have an Exchange 2010 SP2 and Hosted Exchange hybrid setup. I configured everything, moved the relevant mail boxes to Exchange Online and everything was fine and dandy. My on premise Exchange server was running as a virtual machine on a 2012 Server and I needed to move the VM to another VM host running 2008R2. As importing a VM exported from 2012 on 2008R2 isn't supported I created a new VM under 2008R2 and mounted the disk. The host seems to be running OK and I can't see anything wrong with it but after the move I'm unable to open the Exchange Online node in the EMC. The progress stops l (HowTos)