[Samba] Exchange Active Directory Topology service crashes over samba box

[Rowland Penny]

On 12/10/2022 03:24, Ron Murray via samba wrote:
> I'm running samba on a Debian bookworm system, connected to our AD
> domain. Worked fine until a week ago, when Exchange crashed on an
> "Event 4027, MSExchange ADAccess". The error message muttered something
> about "Process msexchangerepl.exe: WCF request to the Microsoft
> Exchange Active Directory Topology service on server
> (TopologyClientTcpEndpoint (localhost) failed.
> 
> Active Directory server <my samba box> is not available. Error message:
> Active directory response: A local error occurred".
> 
> This upset my boss, so I turned off all the samba daemons and disabled
> them. All was fine until last night, when Exchange crashed again, this
> time with "Event 1003, MSExchange Front End HTTP Proxy".
> 
> "[Unknown] An iinrenal server error occurred. The unhandled exception
> was: Microsoft.Exchange.Data.Directory.ADTransientException: The call
> to Microsoft Exchange Active Directory Topology service on server
> 'TopologyClientTcpEndpoint (localhost)' returned an error. Error
> detasils Active Direcvtory server <my samba box> is not available.
> Error message: Active directory response: A local error occurred.. ---
>> System.ServiceModel.FaultException`1[Microsoft.Exchange.Data.Directory
> .TopologyDiscovery.TopologyServiceFault]: Active Directory server <my
> samba box> is not available. Error message: Active directory response:
> A local error occurred."
> 
> Anyone seen anything like this before? Any suggestions on how to fix
> it?
> 
> Thanks,

I have to ask, why are you running an unreleased Debian version in 
production ?

The other questions I have to ask, how are you running Samba (DC, Unix 
domain member) and how is exchange connected to it ?

Rowland