I have added an Exchange 2013 server that will replace our Exchange 2010 server. We also have an Exchange 2010 UM role server which works with our Dialogic gateway that is trunked to our PBX. All is well. But, if I move a UM-enabled Exchange 2010 mailbox to Exchange 2013, UM no longer works for this extension. The Dialogic's outbound route points to the old Exchange server which is apparently rejecting the call. When I put an explicit rule for this extension in the Dialogic and point it to the new Exchange 2013 server, it seems OK. However, there are too many lines for with I would need to create explicit rules making this impractical.
Even though the Dialogic sends the call to Exchange 2010, is there a way so that the Exchange 2010 doesn't reject the call and forwards it to Exchange 2013 instead?
Thanks,
Chris