In Exchange manager I can see the total of all the mailboxes below the First Storage Group - Mailbox Store - is approx 5G
But the actual files don't match this at all
In the event log
The database "First Storage Group\Public Folder Store (TRANSERVSBS1)" has 1 megabytes of free space after online defragmentation has terminated.
The database "First Storage Group\Mailbox Store (TRANSERVSBS1)" has 3361 megabytes of free space after online defragmentation has terminated.
A couple of mailbox users are over 1G.
This is all making no sense to me - can some expert please help? Is it true that mailboxes are limited to 2G each and 16G total for this server? Is it all going to turn black any second?