Question On Failure of Test-MailFlow

Hi ,

We run a script to check health of exchange 2013 servers. Suddenly we observed a test-mailflow error on a single server under DAG. For all the other servers it is ok.

While executing the command test-mailflow on ps we have seen the following error.

PS] C:\Windows\system32>Test-Mailflow
Microsoft.Mapi.MapiExceptionADPropertyError]: MapiExceptionADPropertyError: Unable to submit message. (hr=0x80004005, ec=2418)
iagnostic context:
   Lid: 40487   EMSMDBMT.EcDoRpcExt2 called [length=46]
   Lid: 56871   EMSMDBMT.EcDoRpcExt2 returned [ec=0x0][length=248][latency=15]
   Lid: 52176   ClientVersion: 15.0.1130.7
   Lid: 50032   ServerVersion: 15.0.1130.7
   Lid: 23226   --- ROP Parse Start ---
   Lid: 27962   ROP: ropSubmitMessage [50]
   Lid: 17082   ROP Error: 0x972
   Lid: 27745
   Lid: 21921   StoreEc: 0x972
   Lid: 27962   ROP: ropExtendedError [250]
   Lid: 1494    ---- Remote Context Beg ----
   Lid: 41788
   Lid: 44092
   Lid: 61736   StoreEc: 0x972
   Lid: 63016   dwParam: 0x32
   Lid: 39640   StoreEc: 0x972
   Lid: 10786   dwParam: 0x0        Msg: 15.00.1130.005:<Server Name>
   Lid: 1750    ---- Remote Context End ----
   Lid: 26849
   Lid: 21817   ROP Failure: 0x972
   Lid: 60547   StoreEc: 0x972
   Lid: 21966
   Lid: 30158   StoreEc: 0x972
   + CategoryInfo          : InvalidData: (:) [Test-Mailflow], RecipientTaskException
   + FullyQualifiedErrorId : [Server=,RequestId=91d9812e-8e65-4080-9413-c86dba4bc50e,TimeStamp=05/04/2017 10:38:06] [FailureCategory=Cmdlet-RecipientTaskException] 5AF9971A,Microsoft.Ex
  change.Monitoring.TestMailFlow

1)If we run Test-mailflow  <source Server> -targetserverFQDN <destinationserver> where source server is the problematic server the above error comes.

2)If we run Test-mailflow  <source Server> -targetserverFQDN <destinationserver> where destination server is the problematic one

RunspaceId         : 0797a835-fc16-4f55-9a97-414d8a8ca3f5
TestMailflowResult : *FAILURE*
MessageLatencyTime : 00:00:00
IsRemoteTest       : True
Identity           :
IsValid            : True
ObjectState        : New

 3)If we run Test-mailflow <sourceserver> -target email address <email> from the problematic server the above error is coming.

For other server we are getting a mail from system mailbox.

There are databases on the problematic server and mail flow is working fine. Can you please help to find out the cause.