Hello,
I have a 2013 on premise server and I've migrated some mailboxes over and the numbers aren't adding up so I'm trying to figure out where the discrepancy is. I have a fictional user I created and put a lot of mail in their mailbox.
On the on prem server I ran from powershell
Get-MailboxStatistics -Database “db1” | Sort -Property TotalItemsize | Format-Table DisplayName, LastLoggedOnUserAccount, ItemCount, @{expression={$_.totalitemsize.value.ToMB()};label=”Size(MB)”}, LastLogonTime, LastLogoffTime
Now I've migrated that user over and I can only open their mailbox from the office365 web interface - no longer working on the owa web page, I get a redirect to office365.
This is the migration info from office365
When I go to to that user in office365 exchange admin - it shows 3.36gb in use. Sure there could be some white space but these numbers seem off. And should that number even show for the onprem mailbox when getting the mailbox size -do I have 8gb of wasted space on my on prem server that needs to be cleaned up somehow?