When i browse to my OWA server I receive the following error

Exchange Active Directory Topology Service on server localhost cannot be contacted via RPC interface. Error 0x6D9.

Request
Url: https://webmail.xxxxxx.local:443/owa/auth/error.aspx?url=https://webmail.xxxxxx.local/owa&reason=0
User host address: ::1

Exception
Exception type: Microsoft.Exchange.Clients.Owa.Core.OwaInvalidConfigurationException
Exception message: Exchange Active Directory Topology Service on server localhost cannot be contacted via RPC interface. Error 0x6D9.

Call stack

Microsoft.Exchange.Clients.Owa.Core.OwaConfigurationManager.CreateAndLoadConfigurationManager()
Microsoft.Exchange.Clients.Owa.Core.Globals.InitializeApplication()
Microsoft.Exchange.Clients.Owa.Core.Global.ExecuteApplicationStart(Object sender, EventArgs e)

Inner Exception
Exception type: Microsoft.Exchange.Data.Directory.ADTransientException
Exception message: Exchange Active Directory Topology Service on server localhost cannot be contacted via RPC interface. Error 0x6D9.

Call stack

Microsoft.Exchange.Data.Directory.DSAccessTopologyProvider.GetServersForRole(String[] currentlyUsedServers, ADServerRole role, Int32 serversRequested, Int32[]& mapping)
Microsoft.Exchange.Data.Directory.DSAccessTopologyProvider.GetConfigDCInfo(Boolean throwOnFailure)
Microsoft.Exchange.Data.Directory.TopologyProvider.PopulateConfigNamingContexts()
Microsoft.Exchange.Data.Directory.TopologyProvider.GetConfigurationNamingContext()
Microsoft.Exchange.Data.Directory.ADSession.GetConnection(String preferredServer, Boolean isWriteOperation, Boolean isNotifyOperation, ADObjectId& rootId)
Microsoft.Exchange.Data.Directory.ADSession.GetReadConnection(String preferredServer, ADObjectId& rootId)
Microsoft.Exchange.Data.Directory.ADSession.Find(ADObjectId rootId, String optionalBaseDN, ADObjectId readId, QueryScope scope, QueryFilter filter, SortBy sortBy, Int32 maxResults, IEnumerable`1 properties, CreateObjectDelegate objectCreator, CreateObjectsDelegate arrayCreator)
Microsoft.Exchange.Data.Directory.ADSession.Find(ADObjectId rootId, QueryScope scope, QueryFilter filter, SortBy sortBy, Int32 maxResults, IEnumerable`1 properties, CreateObjectDelegate objectCtor, CreateObjectsDelegate arrayCtor)
Microsoft.Exchange.Data.Directory.ADSession.Find[TResult](ADObjectId rootId, QueryScope scope, QueryFilter filter, SortBy sortBy, Int32 maxResults, IEnumerable`1 properties)
Microsoft.Exchange.Data.Directory.SystemConfiguration.ADSystemConfigurationSession.Find[TResult](ADObjectId rootId, QueryScope scope, QueryFilter filter, SortBy sortBy, Int32 maxResults)
Microsoft.Exchange.Data.Directory.SystemConfiguration.ADSystemConfigurationSession.FindServerByFqdn(String serverFqdn)
Microsoft.Exchange.Data.Directory.SystemConfiguration.ADSystemConfigurationSession.FindLocalServer()
Microsoft.Exchange.Clients.Owa.Core.OwaConfigurationManager.InitializeConfigurationManager()
Microsoft.Exchange.Clients.Owa.Core.OwaConfigurationManager.CreateAndLoadConfigurationManager()

Inner Exception
Exception type: Microsoft.Exchange.Rpc.RpcException
Exception message: Error 6d9 from HrGetServersForRole

Call stack

Microsoft.Exchange.Rpc.ADTopology.ADTopoRpcClient.HrGetServersForRole(String[] currentlyUsedServers, ServerRole role, Int32 serversRequested, ServerInfo[]& suitableServers, Int32[]& mapping)
Microsoft.Exchange.Data.Directory.DSAccessTopologyProvider.GetServersForRole(String[] currentlyUsedServers, ADServerRole role, Int32 serversRequested, Int32[]& mapping)


Any idea what would cause this and how to fix it?

Thanks

HI,

Per my knowledge this issues may be happen when Outlook web access cannot access Updated configuration data from active directory. To solve this issue fallow Microsoft support KB article.

Event ID 64 is logged in the Application log on the Exchange 2007 server, and you receive the following error message when you try to access Outlook Web Access: "Outlook Web Access did not initialize"
==============================================================================
http://support.microsoft.com/kb/930864

http://www.microsoft.com/technet/support/ee/transform.aspx?ProdName=Exchange&ProdVer=8.0&EvtID=64&EvtSrc=MSExchange%20OWA&LCID=1033

Regards

Hi,

1. Please check if MS Exchange AD Topology service is running. If not, then please start it and then check the issue again.

2. Please try to run get-exchangeserver servername status |fl to check if it has statiicdomaincontrollers ,staticGlobalcatalogs.

3. Please try to check event log and then post the detail error information here for further troubleshooting.

Besides, please check the service startup status against the article below:

Services Installed by Exchange Setup

http://technet.microsoft.com/en-us/library/aa998342.aspx

Regards,

Xiu

• Marked as answer by Xiu Zhang Friday, July 03, 2009 10:33 AM

I have this problem and cannot use Microsoft exchange, but the explanations above require a deepper understanding of your computer, which I do not have.

Could someone in simple word tell me what steps I do need to take?

There is the guidance of Xiu, but I caannot find those anywhere, so please explain it in simple stepd

regards