I am use to working with SQL Server Database Mirroring but now we are upgrading to use High Availability Groups.
Whenever I had to restore the mirroring on one of the SQL Server database I use to take a Backup with the "Copy Only" option enabled and restore that along with the transaction files on the other DB Server before configuring the mirroring.
I have found an issue with Availability Groups that a "Copy Only" backup when restored on the other server won't allow me to put the database into "Synchronized" mode. When I use a non "Copy Only" database backup I can put the database into synchronized mode.
Is a non "Copy Only" backup required when restoring on the other server and adding the database into the Availability group? Or, more likely, am I doing something wrong?