I recently took over an Exchange 2007 environment. Exchange Management Console shows 667 objects under mailboxes. This is from many years. There have been many people who left the company or have been fired. We are thinking of moving to hosted Office365, but need to know how many employees/mailboxes are currently in use. With Exchange 2003 I could sort by date last logged in but I don’t see that here. I was thinking to use exmon and have it run for 24 hours to get an approximate number but I don’t think that is recommended.
I tried adding the “Last Modified Time” column but it’s clearly inaccurate, showing me users that I’ve emailed in the last few days as a last modified date of February 28th.