I upgraded the VMM 2008 server two days ago. It turned out to be a relatively painless process. Pop in the DVD (I copied the contents to the machine from the ISO), and upgrade each of the components. I deployed the updated agents to the Hyper-V servers. I then logged into the Operations Manager 2007 R2 RMS and upgraded the integration components. That’s it.
That’s my first step in the upgrade of our Hyper-V hosts done. Next up will be to start the actual OS upgrade of the host servers. It’s a busy time coming up so that might have to wait a few weeks. I’ll have to arrange a maintenance window so as to not affect customer service availability.