1. About Domino Server present edition V7.x, V8.x, may confirm that may be accommodating with SBG V8.0x. 2. In SBG with the Domino Server LDAP connection, suggested that uses Recipient Validation, did not suggest that uses Synchronization。 3. The following attach document, is SBG with the Domino Server two Internet Domain is the example。 4. The explanatory document , has the possibility, because network environment not unexpectedly consistent, supplies the reference and the discussion sincerely. Regards James