Migrated a user mailbox from one forest to another. User now complains he cannot receive email. Looked at properties of mailbox and get the error: "The properties on this object have invalid data. If you click OK, default values will be used instead and will be saved if you do not change them before hitting Apply or OK on the property page. If you click Cancel, the object will be displayed read-only and corrupted values will be retained." Anyone seen this before?