We have 2 SQL 2012 instances on 2 separate vm guest server 2012 that are on separate networks connected via VPN tunnel.
We have about 350 databases that are setup for mirroring, and all these databases are mirroring currently and properly.
Now however, when we go to mirror a new database using the Configure Security option, after clicking Start Mirroring, it just hangs. The dialog goes to (Not Responding) and there is a continuous hourglass.
Additionally, if I remove a mirror from several other databases, I can do that without any problems, but I can't get it to mirror again with the same as above.
Any suggestions on things to check?