We have around 250 users in multiple locations around the world. There are also over 300 shared mailboxes that are accessed. As more shared mailboxes are added, it has caused numerous problems with outlook load times, syncing, and overall performance because some users will have 10, 20, even 50 shared mailboxes attached depending on their access rights.
I was shocked to find that one user had over 180 shared mailboxes attached and he was flabbergasted as to why it would take outlook a half hour to open and tended to crash and run slowly. I've tried all sorts of variations of cached/non-cached modes and other settings to help alleviate the issues, but the problem usually just comes down to the amount of shared mailboxes they have.
I need to find a way to either improve the current setup, or switch to some other method of sharing mail that goes to these inboxes.
We have an added complication that it's a financial firm, so it has a number of policies and other things in place that the solution would need to be able to comply with.