HiI created 2 node SCC mailbox cluster with Exchange 2007 SP1. I have installed the Update Rollup 5 for Exchange SP1. But there's no Default OAB. I checked the event logs but it is showing me no related errors obviously since the OAB does not exist at all. Any suggestions on how to make the server automatically create it?Regards

The OAB is managed through the CAS server role.

OK. But my question was that the Default OAB which should have been created automatically is not present.

Can you confirm the roles you have install on the server for me.

As for as I remember you can only install the mailbox role on a SCC, therefore have you got another server hosting the CAS role?

I have 2 servers with HUB+CAS and a separate 2 node MB Cluster

On the CAS server, is the an OAB application directory showing in IIS management?

Under the Default Website node, there's a container for OAB.

Is there one for OWA?

have a look at thishttp://social.technet.microsoft.com/forums/en-US/exchangesvradmin/thread/3750ae2e-61ec-4845-a2b1-60ff7762464b/and this http://www.swindelles.com/ed/2008/12/05/exchange-2007-offline-address-book-generation/can you connect to the OAB distribution point? does the directory exist in IIS?

Thanks for the replies. I'll check and then post results here.Regards

I went through those articles. As I mentioned before., I'm not getting any OAB related errors since the Default OAB doesnt exist at all

So you can connect to the distribution point? Have the permissions changed on the directory?

no to both of your questions

I would try to re-createhttp://technet.microsoft.com/en-us/library/bb123595.aspx

Dear customer: Did you install Update Rollup 5 for Exchange 2007 Service Pack 1 on your mailbox server? If not, please try to upgrade to Update Rollup 5 for Exchange 2007 Service Pack 1, and then check the effect. Description of Update Rollup 5 for Exchange Server 2007 Service Pack 1 http://support.microsoft.com/kb/953467/en-us If the issue still persists, please help collect the following information: 1. On mailbox server, open Event Viewer, navigate to application and right click it, cleanup it; 2. Open EMS, run the following command : Set-EventLogLevel -Identity MSExchangeSA\OAL Generator Level Expert 3. Run the following command: Update-OfflineAddressBook Identity default Offline Address List Note: Replace default Offline Address List with your exact Offline Address List name. 4. Save the new application log as .evtx file and send it to me for analyze. Note: when you send e-mail to me, please let me know the URL of the post. Rock Wang - MSFT

I solved the issue by creating the Default OAB manually. I don't know why it did not generate automatically. Anyways, after creating the Default OAB manually, I did tests for both OWA and Outlook 2007. Seems to be working OK. Thanks for all the replies.Best regards

do you mean by manually that you havechange the locations of OAB folder from Shared storage to local disk managori

No. The Default OAB was not present. So i created it myself. It is on the shared storage.