Environment: Two domains with trusts and one exchange 2003 mailbox server. User has two ad accounts. Exchange is apart of the 1st domain and user has a mailbox with full mailbox permissions to 2nd domain. We have several users setup this way most people work but two users do not. If the user logs on the 1st domain they are able to schedule resources if the user logs on to the 2nd domain they receive the error "You do not have sufficient permission to perform this operation of this object. See the folder contact or your system administrator. Unable to direcly book a resource for this meeting" the resource is then doubled booked but does not show up on the users calendar On the shared resource calendar default and anon have author permissions. On the mailbox rights authenticated users inherit read perm. Any idea's? thanks,

Hi, Are the two domains in a forest? Allen

No.