Dear All,
We have Environment as below,
Exchange 2010 (MBX) --- Exchange 2010 (Hub/CAS) --- Exchange 2016 (Hybrid) ---- Exchange online ,
I am able to migrate mailbox from exchange 2016 to Exchange online
However when we try to migrate mailbox from Exchange 2010 if fails with below message .
FailureCode : -2146233088
FailureType : TooManyTransientFailureRetriesPermanentException
FailureSide : Source
Message : Error: The job encountered too many transient failures (61) and is quitting. The most common failure is CommunicationErrorTransientException/ServerTooBusyException/WebException with the hit
count 60. --> The call to 'https://mail<domainname>/EWS/mrsproxy.svc' failed. Error details: The HTTP service located at https://mail.<domainname>/EWS/mrsproxy.svc is unavailable. This could be because
the service is too busy or because no endpoint was found listening at the specified address. Please ensure that the address is correct and try accessing the service again later. --> The remote
server returned an error: (503) Server Unavailable.. --> The HTTP service located at https://mail.<Domain name>/EWS/mrsproxy.svc is unavailable. This could be because the service is too busy or
because no endpoint was found listening at the specified address. Please ensure that the address is correct and try accessing the service again later. --> The remote server returned an error:
(503) Server Unavailable.
FailureTimestamp : 10/20/2021 7:20:57 PM
Then there is retries as below
'AUXP273MB0751.AREP273.PROD.OUTLOOK.COM' (15.20.4628.16 ServerCaps:3FFFFFFF,
ProxyCaps:3FFFFFFFFFFFC7DD2DFDBF5FFFFFCB07EFFF, MailboxCaps:, legacyCaps:3FFFFFFF) is examining the request.
10/20/2021 3:04:59 PM [AUXP273MB0751] Content from the Shard mailbox (Mailbox Guid: fbae3fb3-7e1c-4de5-b975-dde5daf91c89, Database: f177eee8-1c87-4db3-b255-427c835658b6) will be merged into
the target mailbox.
10/20/2021 3:04:59 PM [AUXP273MB0751] Connected to target mailbox 'efiuae.onmicrosoft.com\3b4ac44f-ba4f-4ce0-acf6-68ee9c67c061 (Primary)', database 'AREP273DG046-db013', Mailbox server
'AUXP273MB0751.AREP273.PROD.OUTLOOK.COM' Version 15.20 (Build 4628.0).
10/20/2021 3:05:40 PM [AUXP273MB0751] Transient error CommunicationErrorTransientException has occurred. The system will retry (48/60, 48/600).
10/20/2021 3:06:13 PM [AUXP273MB0751] The Microsoft Exchange Mailbox Replication service 'AUXP273MB0751.AREP273.PROD.OUTLOOK.COM' (15.20.4628.16 ServerCaps:3FFFFFFF,
ProxyCaps:3FFFFFFFFFFFC7DD2DFDBF5FFFFFCB07EFFF, MailboxCaps:, legacyCaps:3FFFFFFF) is examining the request.
10/20/2021 3:06:13 PM [AUXP273MB0751] Content from the Shard mailbox (Mailbox Guid: fbae3fb3-7e1c-4de5-b975-dde5daf91c89, Database: f177eee8-1c87-4db3-b255-427c835658b6) will be merged into
Finally
LastFailure : <MiniFailureRec Time="2021-10-20T15:20:57.5517918Z" Type="TooManyTransientFailureRetriesPermanentException/CommunicationErrorTransientException/ServerTooBusyException/WebException" Side="1"
Fatal="true" ETypes="633 10 12 1 14 653" ExStackHash="86ce" />
AnalysisResults :
ConfigCache : Microsoft.M365.Core.ConfigurationSettings.ConfigCache
We have tested the below,
1- ensure there is no firewall between exchange 2010 and exchange 2016
2- we can migrate mailbox from exchange 2010 to exchange 2016
3- checked the iis logs on exchange 2016 , and we can see the exchange 2016 sending 503 back to Exchange online
What we are not able to find is which process from Exchange 2010 is sending the 503 back to exchange 2016.
Need Help.
regards - Hasan Reza.