Hyper-V Replication Failover

[foxski]

Hi,  I hope you can help with an urgent query.  In an environment running Hyper-V replica for a handful of servers between 2 physical hosts - HOST1 went down, and an Unplanned Failover was initiated to HOST2.  Once HOST1 comes back up the servers can be failed back to the original host.  However, how would you best fail back a virtual server running Exchange 2010 on the Replica server?  I know the scenario is not support by Microsoft, and this should never be part of a replica, however what is now the best way to fail-back this Exchange VM onto HOST1 without causing problems?  The options I can see are:

1. As per any other server, use the "Reverse Replication" option - I am not confident that this is likely to succed given the lack of support for Exchange, but could this be the simple fix that allow the Replica to copy its changes back to the original VM and start up without problem?

2. Back up any emails received since this failed over, use 'Cancel Replication' in Hyper-V to 'undo' any changes since this morning & simply fire up the original version of the Exchange VM. We could then restore the emails recieved this morning.  Given that the remaining servers including Active Directory DCs etc are currently running alongside the failed-over version of Exchange VM, will this cause problems when bringing the original Exchange VM back up on HOST1?  Effectively AD will think Exchange has been running all morning but the Exchange server will believe its just powered back on.

Swift responses would be much appreciated, many thanks!

[binaryzero]

You answered your own question, what you're trying to do is unsupported. 

 

Set yourself up a DAG.