Here are the PowerShell commands needed to grand a Domain Admin user rights to all user mailboxes in OWA:
Get-MailboxDatabase | add-ADPermission -User “Domain Admins” -ExtendedRights Send-As, Receive-As, ms-Exch-Store-Admin -InheritanceType All -V
Then run:
Get-Mailbox -resultsize:unlimited | add-mailboxpermission -user AdminX -accessright Fullaccess,SendAs
Where “AdminX” is your user account.
Had to finally step it up and get familiar with what has been in use since 2006. Wow, late bloomer eh? My company would not step up with 64 bit hardware, but that’s still no excuse. Any 64 bit machine with a copy of VMWare will do nicely.
I’m running VMWare ESXi 4, the free version. I started by building out a Windows Server 2008 NON-R2 Enterprise server, updating it, sysprepping it, and copying it. Exchange 2007 can deploy on R2, but it’s such a pain, just use NON-R2, trust me, you’ll be glad you did. Save R2 for Exchange 2010.
