I have 2 SQL2014 servers, both Standard Edition. Server A mirrors it's databases to Server B. I want to upgrade both servers to Enterprise Edition. I assume the proper procedure is to:
1. upgrade Server B to Enterprise
2. move the primary databases from Server A to Server B so that Server A is now the mirror server.
3. upgrade Server A to Enterprise
4. move the primary databases back to Server A from Server B
Is this correct, or can I simply upgrade them in place and not do any moving of the primary databases?