Unable to send emails from shared mailbox

Question

I have setup a shared mailbox in Teams & Groups on MS 365 Admin Centre and added the relevant members to the shared mailbox and they all have Read, Manage and Send permissions but when I try to send an email from the mailbox I get the follow email message:

Your message did not reach some or all of the intended recipients.

  Subject:	test  
  Sent:	16/06/2022 13:24  

The following recipient(s) cannot be reached:
``` Garry Barton (SHHS) on 16/06/2022 13:24
This message could not be sent. You do not have the permission to send the message on behalf of the specified user.

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Diagnostic information for administrators:    
__________________________________________________    
    
Error is [0x80070005-0x000004dc-0x00000524].    
    
Exchange response headers:  
request-id:   
X-ServerApplication: Exchange/15.20.5353.014  
X-FEServer: LO3P123CA0003  
X-BEServer: CWLP265MB2707  
X-CalculatedBETarget: CWLP265MB2707.GBRP265.PROD.OUTLOOK.COM  
X-RequestId:   
X-ClientInfo:   
X-ElapsedTime: 62  
X-BackEndHttpStatus: 200  
X-ResponseCode: 0  
X-DiagInfo: CWLP265MB2707  
X-RequestType: Execute  


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ROPs Summary:    
    ```
0: ropSetProps (10) Processed(1) Completed(0)  
	ROP result: 0  
	Response codes: 0  
1: ropSetProps (10) Processed(1) Completed(0)  
	ROP result: 0  
	Response codes: 0  
2: ropFlushRecipients (14) Processed(1) Completed(0)  
	ROP result: 0  
	Response codes: 0  
3: ropSetProps (10) Processed(1) Completed(0)  
	ROP result: 0  
	Response codes: 0  
4: ropTransportSend (74) Processed(1) Completed(0)  
	ROP result: 0  
	Response codes: 1244  

---

Response Exceptions:

ROP Index: 4
ROP Associated: ropTransportSend (74)
Microsoft.Exchange.Data.Storage.SendAsDeniedException: Can't send message. ---> Microsoft.Mapi.MapiExceptionSendAsDenied: MapiExceptionSendAsDenied: Unable to send message. (hr=0x80070005, ec=1244)
0. 35250:0C000000, 1.36674:01000000, 1.61250:00000000, 1.45378:02000000, 1.44866:00000000, 1.36674:01000000, 1.61250:00000000, 1.45378:05000000, 1.44866:00000000, 1.36674:7A000000, 1.61250:00000000, 1.45378:08000000, 1.44866:00140000, 1.36674:0A000000, 1.61250:00000000, 1.45378:19000000, 1.44866:6E0D0000, 1.36674:0E000000, 1.61250:00000000, 1.45378:8A0D0000, 1.44866:78020000, 16.55847:4B0B0000, 17.43559:0000000034020000000000000000000000000000, 20.52176:140FE9940E00000000000000, 20.50032:140FE9947E1770200201DA36, 0.35180:01000000, 255.23226:8E000000, 255.27962:7A000000, 255.27962:0A000000, 255.27962:0E000000, 255.31418:0A002F3D, 0.35250:1A000000, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:18000000, 1.36674:4A000000, 1.61250:00000000, 1.45378:1D000000, 1.44866:00000000, 16.55847:7E000000, 17.43559:0000000080030000000000000000000000000000, 20.52176:140FE9940E0070200A004366, 20.50032:140FE9947E171010C1000000, 0.35180:1F000430, 255.23226:01000000, 255.27962:0A000000, 255.27962:4A000000, 255.17082:DC040000, 0.44949:C9000000, 4.21921:DC040000, 255.27962:FA000000, 255.1494:CE000000, 0.38698:05000780, 1.41134:46000000, 7.36354:010000000000010B86000000, 0.37692:01000000, 0.37948:1A010480, 5.33852:00000000534D545000010480, 4.56248:DC040000, 7.40748:010000000000010B05000780, 7.57132:000000000000000000000000, 4.39640:DC040000, 1.63016:4A000000, 8.45434:D5014BE3351EAD4494FEB483C2C4C3971A010480, 1.46798:13000000, 5.10786:0000000031352E32302E353335332E3031343A43574C503236354D42323730373A39393530613839392D343561352D343838302D396536622D6663363364653136626233343A383335303000, 7.51330:B358220F934FDA082D666336, 0.39570:36626233, 1.55954:0A000000, 0.49266:A4000000, 1.33010:0A000000, 2.54258:00000000, 0.40002:7A000000, 1.56562:00000000, 1.64146:4A000000, 1.33010:4A000000, 2.54258:DC040000, 255.1750:11010000, 255.31418:0A001870, 0.22753:00000000, 255.21817:DC040000, 0.34722:40000A67, 4.51106:DC040000, 0.41890:1B010000, 4.58274:DC040000, 0.59285:00000000, 4.46997:DC040000
at Microsoft.Mapi.MapiExceptionHelper.InternalThrowIfErrorOrWarning(String message, Int32 hresult, Boolean allowWarnings, Int32 ec, DiagnosticContext diagCtx, Exception innerException, MapiStore mapiStore)
at Microsoft.Mapi.MapiExceptionHelper.ThrowIfError(String message, Int32 hresult, IExInterface iUnknown, Exception innerException, MapiStore mapiStore)
at Microsoft.Mapi.MapiBase.ThrowIfError(String message, Int32 hr)
at Microsoft.Mapi.MapiMessage.TransportSendMessage(PropValue[]& propsToReturn)
at Microsoft.Exchange.Data.StoreObjects.MapiAccessorExtensionMethods.TransportSendMessage(IStoreSession storeSession, Object mapiObject, ExTimeZone timezone, PropValue[]& mapiPropValues)
--- End of inner exception stack trace ---
at Microsoft.Exchange.Data.StoreObjects.MapiAccessorExtensionMethods.TransportSendMessage(IStoreSession storeSession, Object mapiObject, ExTimeZone timezone, PropValue[]& mapiPropValues)
at Microsoft.Exchange.Data.Storage.CoreItem.TransportSend(PropertyDefinition[]& properties, Object[]& values)
at Microsoft.Exchange.Data.StoreObjects.CoreItemMetricLogger.TransportSend(PropertyDefinition[]& properties, Object[]& values)
at Microsoft.Exchange.RpcClientAccess.Handler.Message.TransportSend()
at Microsoft.Exchange.RpcClientAccess.Handler.RopHandler.<>c__DisplayClass156_0.<TransportSend>b__0()
at Microsoft.Exchange.RpcClientAccess.Handler.ExceptionTranslator.TryExecuteCatchAndTranslateExceptions[TResult]

Transport-Send failed: failure enum(25), HResult(0x00000000), EC(1244).
Transport-Send failed: failure enum(22), HResult(0x00000000), EC(1244).
Submit-Message failed: message id(2), failure enum(13), HResult(0x80070005), EC(1244).

Does anyone have any suggestions of how this can be rectified??

Best Regards
Simon

Answer 1

Had the same issue

My problem was that the shared mailbox setting "Show in global address list" was No.

After enabling it and removing the Offline Adress book ad the client side "C:\Users%username%\AppData\Local\Microsoft\Outlook\Offline Address Books"

The issue was sollved.