Trying to grant a user from Domain B "Send as" permission to an account on Domain A. Receiving the folowing error: Microsoft Active Directory - Exchange Extension A constraint Violation occurred. Facility: LDAP Provider ID no: 8007202f Microsoft Active Directory - Exchange Extension I've tried logging in as DomainA\administrator account, tried my account as I'm apart of DomainA\Domain Admins and tried using the account on DomainB\Administrator, still no luck.
