When you try to grant the Send As permission of a linked mailbox in an account forest in Microsoft Exchange Server 2013, the permission is granted to a disabled user in the Exchange Server 2013 forest instead of the user in the account forest.
Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.