I'm using Export-Mailbox to export some data into PST in various occasions, like when the user is leaving or to slim some users mailboxes.
I noticed something strange recently.
When I run the same command with same parameters, I get different PST sizes !
I was exporting 'Inbox' contents for a specific month for one user, I did it 3 times, and 3 times the file size was different.
When I attached the PSTs to outlook, I've got the same number of items, I checked few attachments and it all looked fine.
I don't remember exactly what the file sizes were so lets assume 1st was 1GB, 2nd was 2GB and 3rd was 3GB.
I thought that the size difference would be just empty space so I compressed the 2nd one and to my surprise, after compression the file was still bigger than a 1st one.
Can someone try to explain me that behavior ?