Erro de MAPI no #Exchange

Amigos,
Estave eu instalando um anti-spam no Exchange e o mesmo nao conseguia conectar de maneira nenhuma, quando procurei algo nos logs surgiu a seguinte mensagem.

Jul 13 17:37:59 anti-spam[1640] ERROR: Failed to open exchange msg store [MAPI_E_FAILONEPROVIDER]


Segue o log completo.


Jul 13 17:37:59 anti-spam[1640] INFO: Exchange server [127.0.0.1] evaluates to 127.0.0.1
Jul 13 17:37:59 anti-spam[1640] INFO: opening exchange private store
Jul 13 17:37:59 anti-spam[1640] INFO: mapi logon succeeded
Jul 13 17:37:59 anti-spam[1640] INFO: opening exchange public store
Jul 13 17:37:59 anti-spam[1640] INFO: mapi logon succeeded
Jul 13 17:37:59 anti-spam[1640] ERROR: Failed to open exchange msg store [MAPI_E_FAILONEPROVIDER]
Jul 13 17:37:59 anti-spam[1640] ERROR: Failed to open exchange public store
Jul 13 17:37:59 anti-spam[1640] ERROR: Failed to startup public store manager
Jul 13 17:37:59 anti-spam[1640] CRITICAL: server: failed to initialize exchange manager
Jul 13 17:37:59 anti-spam[1640] CRITICAL: failed to initialize - will retry again in 30 seconds
Jul 13 17:37:59 anti-spam[1640] NOTICE: shutting down exchange manager


Verifiquei e o MAPI estava instalado, entao fui no #Exchange e criei um Public Folder.

Pronto. Reiniciei o Exchange e o anti-spam conseguiu conectar no servidor.