Set passwords to never expire in office 365
First, Enable .net 3.5 on your system. Then, Download and Install Microsoft Online Services Sign-In Assistant Microsoft Online...
List users and size of mailbox in Exchange 2007 and 2010 with Powershell
Get-Mailbox | Get-MailboxStatistics | select-object DisplayName, {$_.TotalItemSize.Value.ToMB()}
Find emails with Powershell commandlets
Get-MessageTrackingLog -start “12/18/2011 08:00” -Sender user@domain.com | Format-List sender, Recipients, timestamp, MessageSubject Get-MessageTrackingLog -MessageSubject Testsubject