We are having a problem in Exchange Online/365. I'm not sure it can be remedied, but wanted to see if anyone has any advice.
We recently migrated to 365. We have an office here with 4 users, and besides their own mail, they also manage seven senior officials mailboxes. We get frequent FOIA requests of these mailboxes.
The head of this department, when we still had a premise Exchange server, had her local profile set up with her email, and all seven of the other mailboxes as well using the "open additional mailboxes" option. Her mailbox is 20 Gb, and one of the other boxes is 5Gb. She has to constantly move between the mailboxes, moving items between the accounts. There are several hundred, may thousands of folders. This worked ok on the premise server, but now with us being online, of course we are having trouble.
She tried to have it setup in a similar manner, with all of the other mailboxes listed in the "open other mailbox" option. However, when accessing the mail, or trying to move between folders, her pc locks up, gives her memory errors, and is basically unusable. Her memory is maxed out. I've contacted Microsoft, and they don't have a solution.
Does any one have any suggestions? I don't think we're going to be able to replicate the old environment.