The way I did it was to set up the new server as Mirror Slave.  It seems it have picked up all email and accounts.

I did a test check on the new server and got a bunch of "Old message expiring or expiring soon"  I remember we got those last time we did this also.  Any reason?  Any way we can avoid these?

That message comes from the expire process that deletes old emails...  It means you have an expire rule on one of the servers...

 

Also, does mirroring mirror the surgeplus calendar stuff?

I believe so.
    ChrisP.

 

TIA