So i moved a user over to a new domain and setup their office 365 account. I attached their archive PST file to the outlook client. So the user logs in and notices that the file and folder structure is completely different from before.
So then i relogged them back to the old domain profile and voila the same archive pst folder is back to what it used to be.
Made a back up of that archive pst file and then went back to the new domain.
Sure enough the archive pst looked different. From there I bring the back of the PST and attach it to the outlook client.
But now when original PST is attached it looks like the new domain PST.
Now i can't get back that old original PST. Anybody got any advice on this?