Hi Everyone, We have two Hut transport servers on our environment. Both of them are exchange 2007 SP3 which has installed on Windows 2008 R2. The original default configuration is that the Microsoft Transport Service is run as Network Service. After reading the below article, we can resolve the issue by change the run as service to local system. Why would it happen? I have another HT server which is running Network service without any problems....I want to know what is the casue for this problem... http://webcache.googleusercontent.com/search?q=cache:rLlD_Czp-xYJ:myit4u.wordpress.com/+%22retryable+mailbox+access+denied+failure%22&cd=5&hl=zh-TW&ct=clnk&gl=tw&source=www.google.com.tw Thanks OCS Users

Its a know thing when you install Exchange 2007 SP3, MS Exchange Transport Service doesn't start until or unless you change it to Local from Network. What is the Rollup Update you are running on the server?Gulab | MCITP: Exchange 2010-2007 | Skype: Gulab.Mallah | Blog: www.ExchangeRanger.blogspot.com

What did the event viewer log for that ?Vincenzo MCTS, MCTIP Server 2008 | MCTS Exchange 2010 | WatchGuard Firewall Security Professional

1. I've seen similar issue on one site, this was some time ago and it was due to the below. I suspect this is the same issue you're having. If you want you can test this yourself after reading the below. http://blogs.technet.com/b/exchange/archive/2008/07/08/3405717.aspx http://blogs.technet.com/b/sfodel/archive/2008/07/10/exchange-2007-hub-transport-service-will-not-start.aspx http://support.microsoft.com/kb/944752 Sukh

Hello, Did you check your IP V6 settings ? If you didnt disable it properly there could be a problem when starting service. By default Transport Service is run as Network Service. So you should change back to Network Service. Transport service need to access information from other machine thats the reson why Transport service is running as Network Service. Sometime you cant start Transport Service Once Exchange server cannot check Certificate CRL. So please check your Exchange server can access approproate URLs to access Certificate CRL. http://support.microsoft.com/kb/929852 http://blogs.technet.com/b/exchange/archive/2010/05/14/3409948.aspx Regrads Chinthaka Shameera | MCITP: EA | MCSE: M | http://howtoexchange.wordpress.com/

Hello, Did you check your IP V6 settings ? If you didnt disable it properly there could be a problem when starting service. By default Transport Service is run as Network Service. So you should change back to Network Service. Transport service need to access information from other machine thats the reson why Transport service is running as Network Service. Sometime you cant start Transport Service Once Exchange server cannot check Certificate CRL. So please check your Exchange server can access approproate URLs to access Certificate CRL. http://support.microsoft.com/kb/929852 http://blogs.technet.com/b/exchange/archive/2010/05/14/3409948.aspx Regrads Chinthaka Shameera | MCITP: EA | MCSE: M | http://howtoexchange.wordpress.com/ Actually, we have two hub transport server, only server 1 has this issue and need to set the network service to local system account. The trasnsport service can be started even though using network service but it will have the error message"432 4.3.2 STOREDRV.Deliver; retryable mailbox access denied failure" on Server 1. Server 2 are using network service without issue. Both of the server are the same configure and IPv6 has been disabled..

The ht servers have not added to the Exchange Server group so that there have no permission to deliever the emails via network service. Add the ht server to exchange servers group then reboot ht server to resolve the issue