We have a user who has approximately 3,000 unread messages. When she uses the webclient, her mailbox seems to behave several times slower than anyone else's web interface, even of mailboxes roughly the same size. Moving a message from one folder to another takes 10-20 seconds. She's using decently powered client hardware (the same client we are all using). We are using 5.0.16, and the problem has been apparent since the beginning, since 5.0.0.
- Could the slowness be caused by the number of unread messages?
- What can we do to increase her performance?