Updating to Exchange 2013 - any way to do it now?

Exchange 2013 is out, available for some epople already. Got if from the VLC Center, now trying to get an upgrade path that works for some customers.

Problem:

• There is no upgrade. It is "install on new Server, move mailboxes. This means coexistence with Exchagne 2010 for the time to move the Mailbox.
• Sadly the only compatible Exchange is Exchange 2010 Sp3 - which is not going to be bout for quite some time.

Any way to still do an update? Backup, restore to new Server? Any beta of the SP that is good enough to ONLY move the mailboxes? I do not care about the rest - this really is "install Exchange 2013, move mailboxes, UNINSTALL 2010".

I am quite - ah - unhappy that at the end the only one who will be able to intall 2013 are new companies right now.

If there isn't even an officially supported upgrade path out there yet, may it be that Exchange 2013 is a bit... too young to actually deploy it in a production environment?

There is now an official co-existence and migration path.

You need Exchange 2010 SP3 and Exchange 2013 CU1. This will allow for co-existence and migration of mailboxes within the same organization. 2013 CU1 is set to be released on April 2, 2013.