In an effortfor a migration, I need to figure out which Exchange Mailboxes are active. What is the best way of retriveing that information via script or? I have lots of mailboxes, mailstores, mail servers. I don't mind taking it on mail server at a time, I just needa list. Big clean up effort.

What do you mean as active? Do you mean has a user attached to a mailbox? You can right click on the mailbox folder in Exchange System Manager and select, Run Clean Up Agent. This will mark any mailboxes with no AD user attached with a Red X.Mark Morowczynski|MCSE 2003:Messaging, Security|MCITP: Enterprise Support|MCTS:Windows Mobile Admin|Security+|http://almostdailytech.com

No, I mean as in still being used. We have discovered many enabled accounts with mailboxes and some people have permissions to them, even though the employee is no longer there. I was wondering if there was a way to to know if the mailboxes are still being used.

You can use ExMerge to see how much mail has been delivered by a specific date. However, if you have employee accounts that are still active in the domain but no longer work there, that is a security risk. I would say disable those accounts and find owners for those mailboxes. Mark Morowczynski|MCSE 2003:Messaging, Security|MCITP: Enterprise Support|MCTS:Windows Mobile Admin|Security+|http://almostdailytech.com

You can know whether the mailbox still being used by ESM In the ESM, View menu, Add/Remove Columns option, add Last Logon Time and Last Logoff Time, so we can see the time of each mailbox in ESM>AG>Server>Mailbox Store>Mailboxes

Hi Bonca,Addition to James' reply, you can enable auditing to know if mailbox is being used by somebody else (manager or team member) incase employee is no longer exist in organization.Auditing Mailbox Access Using Exchange System Manager and Event Viewerhttp://www.msexchange.org/tutorials/Auditing-Mailbox-Access-Exchange-System-Manager-Event-Viewer.htmlAmit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com