Exchange migration failing

%3CLINGO-SUB%20id%3D%22lingo-sub-2248674%22%20slang%3D%22en-US%22%3EExchange%20migration%20failing%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2248674%22%20slang%3D%22en-US%22%3E%3CP%3EHi%20All%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EHope%20everyone%20is%20well.%20Please%20can%20someone%20assist%20me%20with%20the%20issue%20below.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EI%20am%20trying%20to%20migrate%20a%20mailbox%20from%20on-prem%20to%20Exo.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EThe%20migration%20is%20failing%20with%20the%20following%20error.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EThe%20call%20to%20'%3CA%20href%3D%22https%3A%2F%2Fwebmail.mycomp.co.za%2FEWS%2Fmrsproxy.svc%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fwebmail.mycomp.co.za%2FEWS%2Fmrsproxy.svc%3C%2FA%3E'%20failed.%20Error%20details%3A%20Could%20not%20establish%20secure%20channel%20for%20SSL%2FTLS%20with%20authority%20'webmail.mycomp.co.za'.%20--%26gt%3B%20The%20request%20was%20aborted%3A%20Could%20not%20create%20SSL%2FTLS%20secure%20channel.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EWhen%20I%20try%20to%20validate%20the%20migration%20endpoint%20in%20Exo%20it%20states%20that%20it%20cannot%20connect%20to%20webmail.mycomp.co.za.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EIt%20used%20to%20work%20but%20just%20stopped%20all%20of%20a%20sudden.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EAlso%20tried%20running%20this%3A%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3ETest-MigrationServerAvailability%20-Endpoint%20webmail.mycomp.co.za%3C%2FP%3E%3CP%3E%3CBR%20%2F%3ERunspaceId%20%3A%20eb52a2c2-2720-4e94-8b19-2cd6278a218e%3CBR%20%2F%3EResult%20%3A%20Failed%3CBR%20%2F%3EMessage%20%3A%20The%20connection%20to%20the%20server%20'webmail.mycomp.co.za'%20could%20not%20be%20completed.%3CBR%20%2F%3ESupportsCutover%20%3A%20False%3CBR%20%2F%3EErrorDetail%20%3A%20Microsoft.Exchange.Migration.MigrationServerConnectionFailedException%3A%20The%20connection%20to%20the%20server%20'webmail.mycomp.co.za'%20could%20not%20be%20completed.%20---%26gt%3B%3CBR%20%2F%3EMicrosoft.Exchange.MailboxReplicationService.MRSRemoteTransientException%3A%20The%20call%20to%20'%3CA%20href%3D%22https%3A%2F%2Fwebmail.mycomp.co.za%2FEWS%2Fmrsproxy.svc%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fwebmail.mycomp.co.za%2FEWS%2Fmrsproxy.svc%3C%2FA%3E'%20failed.%20Error%20details%3A%20Could%20not%20establish%20secure%20channel%20for%20SSL%2FTLS%20with%20authority%3CBR%20%2F%3E'webmail.mycomp.co.za'.%20--%26gt%3B%20The%20request%20was%20aborted%3A%20Could%20not%20create%20SSL%2FTLS%20secure%20channel..%20---%26gt%3B%20Microsoft.Exchange.MailboxReplicationService.MRSRemotePermanentException%3A%20Could%20not%20establish%20secure%20channel%20for%3CBR%20%2F%3ESSL%2FTLS%20with%20authority%20'webmail.mycomp.co.za'.%20---%26gt%3B%20Microsoft.Exchange.MailboxReplicationService.MRSRemotePermanentException%3A%20The%20request%20was%20aborted%3A%20Could%20not%20create%20SSL%2FTLS%20secure%20channel.%3CBR%20%2F%3E---%20End%20of%20inner%20exception%20stack%20trace%20---%3CBR%20%2F%3E---%20End%20of%20inner%20exception%20stack%20trace%20---%3CBR%20%2F%3Eat%20Microsoft.Exchange.MailboxReplicationService.MailboxReplicationServiceFault.ReconstructAndThrow(String%20serverName%2C%20VersionInformation%20serverVersion)%3CBR%20%2F%3Eat%20Microsoft.Exchange.Connections.Common.WcfClientWithFaultHandling%602.%26lt%3B%26gt%3Bc__DisplayClass4_0.%3CCALLSERVICE%3Eb__0()%3CBR%20%2F%3Eat%20Microsoft.Exchange.Net.WcfClientBase%601.CallService(Action%20serviceCall%2C%20String%20context)%3CBR%20%2F%3Eat%20Microsoft.Exchange.Connections.Common.WcfClientWithFaultHandling%602.CallService(Action%20serviceCall%2C%20String%20context)%3CBR%20%2F%3Eat%20Microsoft.Exchange.MailboxReplicationService.WcfClientWithVersion%602.CallService(Action%20serviceCall%2C%20String%20context)%3CBR%20%2F%3Eat%20Microsoft.Exchange.Migration.MigrationExchangeProxyRpcClient.CanConnectToMrsProxy(Fqdn%20serverName%2C%20Guid%20mbxGuid%2C%20NetworkCredential%20credentials%2C%20LocalizedException%26amp%3B%20error)%3CBR%20%2F%3E---%20End%20of%20inner%20exception%20stack%20trace%20---%3CBR%20%2F%3Eat%20Microsoft.Exchange.Migration.MigrationEndpointVerifier.VerifyConnectivity(MigrationEndpointBase%20endpoint)%3CBR%20%2F%3Eat%20Microsoft.Exchange.Management.Migration.MigrationService.Endpoint.TestMigrationServerAvailability.InternalProcessEndpoint(Boolean%20fromAutoDiscover)%3CBR%20%2F%3ETestedEndpoint%20%3A%3CBR%20%2F%3EIsValid%20%3A%20True%3CBR%20%2F%3EIdentity%20%3A%3CBR%20%2F%3EObjectState%20%3A%20New%3C%2FCALLSERVICE%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EAppreciate%20any%20advice%20and%20feedback.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-2248674%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3E2016%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EExchange%20Online%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EExchange%20Server%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EHybrid%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-2249244%22%20slang%3D%22en-US%22%3ERe%3A%20Exchange%20migration%20failing%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2249244%22%20slang%3D%22en-US%22%3EHi%2C%20try%20this%20%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fexchange-team-blog%2Ftroubleshooting-hybrid-migration-endpoints-in-classic-and-modern%2Fba-p%2F953006%22%20target%3D%22_blank%22%3Ehttps%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fexchange-team-blog%2Ftroubleshooting-hybrid-migration-endpoints-in-classic-and-modern%2Fba-p%2F953006%3C%2FA%3E%3CBR%20%2F%3Eit%20is%20a%20long%20document%20but%20it%20may%20sort%20your%20issue.%3CBR%20%2F%3E%3C%2FLINGO-BODY%3E
Regular Contributor

Hi All

 

Hope everyone is well. Please can someone assist me with the issue below.

 

I am trying to migrate a mailbox from on-prem to Exo.

 

The migration is failing with the following error.

 

The call to 'https://webmail.mycomp.co.za/EWS/mrsproxy.svc' failed. Error details: Could not establish secure channel for SSL/TLS with authority 'webmail.mycomp.co.za'. --> The request was aborted: Could not create SSL/TLS secure channel.

 

When I try to validate the migration endpoint in Exo it states that it cannot connect to webmail.mycomp.co.za.

 

It used to work but just stopped all of a sudden.

 

Also tried running this:

 

Test-MigrationServerAvailability -Endpoint webmail.mycomp.co.za


RunspaceId : eb52a2c2-2720-4e94-8b19-2cd6278a218e
Result : Failed
Message : The connection to the server 'webmail.mycomp.co.za' could not be completed.
SupportsCutover : False
ErrorDetail : Microsoft.Exchange.Migration.MigrationServerConnectionFailedException: The connection to the server 'webmail.mycomp.co.za' could not be completed. --->
Microsoft.Exchange.MailboxReplicationService.MRSRemoteTransientException: The call to 'https://webmail.mycomp.co.za/EWS/mrsproxy.svc' failed. Error details: Could not establish secure channel for SSL/TLS with authority
'webmail.mycomp.co.za'. --> The request was aborted: Could not create SSL/TLS secure channel.. ---> Microsoft.Exchange.MailboxReplicationService.MRSRemotePermanentException: Could not establish secure channel for
SSL/TLS with authority 'webmail.mycomp.co.za'. ---> Microsoft.Exchange.MailboxReplicationService.MRSRemotePermanentException: The request was aborted: Could not create SSL/TLS secure channel.
--- End of inner exception stack trace ---
--- End of inner exception stack trace ---
at Microsoft.Exchange.MailboxReplicationService.MailboxReplicationServiceFault.ReconstructAndThrow(String serverName, VersionInformation serverVersion)
at Microsoft.Exchange.Connections.Common.WcfClientWithFaultHandling`2.<>c__DisplayClass4_0.<CallService>b__0()
at Microsoft.Exchange.Net.WcfClientBase`1.CallService(Action serviceCall, String context)
at Microsoft.Exchange.Connections.Common.WcfClientWithFaultHandling`2.CallService(Action serviceCall, String context)
at Microsoft.Exchange.MailboxReplicationService.WcfClientWithVersion`2.CallService(Action serviceCall, String context)
at Microsoft.Exchange.Migration.MigrationExchangeProxyRpcClient.CanConnectToMrsProxy(Fqdn serverName, Guid mbxGuid, NetworkCredential credentials, LocalizedException& error)
--- End of inner exception stack trace ---
at Microsoft.Exchange.Migration.MigrationEndpointVerifier.VerifyConnectivity(MigrationEndpointBase endpoint)
at Microsoft.Exchange.Management.Migration.MigrationService.Endpoint.TestMigrationServerAvailability.InternalProcessEndpoint(Boolean fromAutoDiscover)
TestedEndpoint :
IsValid : True
Identity :
ObjectState : New

 

Appreciate any advice and feedback.

 

 

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