Hi Everyone, I'm running a simplified hosted exchange setup from the instructions here: http://www.msexchange.org/articles_tutorials/exchange-server-2007/migration-deployment/shared-hosting-exchange-2007-part2.html It uses ADSIEdit to restrict access to Global Adress Lists, ALs and OABs . The clients seem to be running OK and are restricted to their own lists but all OABs fail to generate with the error below. The setup is a simple single Exchange server (Hosatedexchsvr1) and single AD server (Hostedexchad1). Can anyone tell from below what username is missing permissions? What username does OABGEN run under? Log Name: Application Source: MSExchangeSA Date: 06/01/2011 05:07:06 Event ID: 9330 Task Category: (13) Level: Error Keywords: Classic User: N/A Computer: hostedexchsvr1.xxxx.local Description: OABGen encountered error 80040115 (internal ID 50004b4) accessing Active Directory HOSTEDEXCHAD1 for ''. - \Dunkers Ltd OAB Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="MSExchangeSA" /> <EventID Qualifiers="49152">9330</EventID> <Level>2</Level> <Task>13</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2011-01-06T05:07:06.000000000Z" /> <EventRecordID>101432</EventRecordID> <Channel>Application</Channel> <Computer>hostedexchsvr1.xxxx.local</Computer> <Security /> </System> <EventData> <Data>80040115</Data> <Data>50004b4</Data> <Data>HOSTEDEXCHAD1</Data> <Data> </Data> <Data>\Dunkers Ltd OAB</Data> </EventData> </Event>

Hi, Please also run ExBPA to check if there is any error or warning.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT