Thursday 7 July 2011

Exchange 2003: Mailbox Loses Send As Permission

Mailbox loses send as permissions after a few minutes.

In Active Directory, go to Security tab, Advanced and set Default permissions.
This issue can be caused by the user account being a member of Domain Admins.

This article explains about Protected Groups & AdminSDHolder in further detail:

Exchange 2003: Unable to Access Mailbox via OWA

If you're unable to access a single mailbox via OWA check under Active Directory > Exchange Advanced > Mailbox Rights that SELF has Full mailbox access ticked.