Hello,I post here because we have no issue for a problem:An Exchange 2007 can't provide the GAL after a migration of Exchange 2003. We try to update the OAB in GUI and Powershell with the following: Get-OfflineAddressBook | Update-OfflineAddressBook Get-ClientAccessServer | Update-FileDistributionService -Type "OAB"It works during 1 month. After that for no reason, it disapears.Following the message when you try to access in OWA:RequestUrl: https://mailhost.company.be:443/owa/forms/premium/DirectoryView.aspx?ae=AddressList&t=Recipients&a=PickUser host address: 217.64.244.202User: AdministratorEX Address: /o=company/ou=First Administrative Group/cn=Recipients/cn=AdministratorSMTP Address: Administrator@company.beOWA version: 8.2.176.2Mailbox server: company-EXCHANGE.companymain.company ExceptionException type: Microsoft.Exchange.Data.Directory.ADOperationExceptionException message: Active Directory operation failed on company-fs.companymain.company. This error is not retriable. Additional information: The specified method is not supported. Active directory response: 00002040: SvcErr: DSID-031401C5, problem 5010 (UNAVAIL_EXTENSION), data 0 Call stack Microsoft.Exchange.Data.Directory.ADSession.AnalyzeDirectoryError(PooledLdapConnection connection, DirectoryRequest request, DirectoryException de, Int32 totalRetries, Int32 retriesOnServer) Microsoft.Exchange.Data.Directory.ADGenericReader.GetNextResultCollection(Type controlType, DirectoryControl& responseControl) Microsoft.Exchange.Data.Directory.ADVirtualListView.GetNextResultCollection() Microsoft.Exchange.Data.Directory.ADVirtualListView.SeekToOffset(SeekReference seekReference, Int32 offset) Microsoft.Exchange.Data.Directory.SystemConfiguration.AddressBookBase.BrowseTo(String& cookie, ADObjectId rootId, Int32& lcid, String& preferredServerName, String seekToString, Int32 seekToOffset, Int32 itemCount, Int32& currentRow, Boolean seekToCondition, Boolean isVirtualListView, PropertyDefinition[] properties) Microsoft.Exchange.Data.Directory.SystemConfiguration.AddressBookBase.BrowseTo(String& cookie, ADObjectId rootId, Int32& lcid, String& preferredServerName, Int32 startRange, Int32 itemCount, Int32& currentRow, Boolean isVirtualListView, PropertyDefinition[] properties) Microsoft.Exchange.Clients.Owa.Premium.Controls.ADListViewDataSource.LoadBrowsePage(Int32 startRange, Int32 itemCount, Boolean seekToCondition, PropertyDefinition[] properties) Microsoft.Exchange.Clients.Owa.Premium.Controls.ADListViewDataSource.Load(Int32 startRange, Int32 itemCount) Microsoft.Exchange.Clients.Owa.Premium.ListViewPage.OnLoad(EventArgs e) System.Web.UI.Control.LoadRecursive() System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) Inner ExceptionException type: System.DirectoryServices.Protocols.DirectoryOperationExceptionException message: An error occurred when attempting to perform a requested Virtual List View operation. Call stack System.DirectoryServices.Protocols.LdapConnection.ConstructResponse(Int32 messageId, LdapOperation operation, ResultAll resultType, TimeSpan requestTimeOut, Boolean exceptionOnTimeOut) System.DirectoryServices.Protocols.LdapConnection.SendRequest(DirectoryRequest request, TimeSpan requestTimeout) Microsoft.Exchange.Data.Directory.PooledLdapConnection.SendRequest(DirectoryRequest request, LdapOperation ldapOperation) Microsoft.Exchange.Data.Directory.ADGenericReader.GetNextResultCollection(Type controlType, DirectoryControl& responseControl)Thank you for help.

Hi,The issue may occur when the address book (AB) function in Exchange 2007 does not work when the Exchange Outlook Web Access (OWA) client and the domain controller do not have the same locale setting.Please apply the following kB and then reboot the Domain Controller.The address book function in Exchange 2007 is broken when an Exchange OWA client and a Windows Server 2003-based domain controller do not have the same locale settinghttp://support.microsoft.com/kb/919166Regards,Xiu

Hello, i've applied on the 2 2003 server, reboot and it works !! Thank you for help