scheduling & cancelation in MS learning is not let me and throws below error

%3CLINGO-SUB%20id%3D%22lingo-sub-2189234%22%20slang%3D%22en-US%22%3Escheduling%20%26amp%3B%20cancelation%20in%20MS%20learning%20is%20not%20let%20me%20and%20throws%20below%20error%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2189234%22%20slang%3D%22en-US%22%3E%3CP%3E%3CSPAN%3E%26nbsp%3Bidentity%20provider%20'live.com'%20does%20not%20exist%20in%20tenant%20'Microsoft%20Services'%20and%20cannot%20access%20the%20application%20'b9c392b1-7049-4d6c-86bf-9bb91214900d'(Microsoft%20Learning%20Identity%20Service)%20in%20that%20tenant.%20The%20account%20needs%20to%20be%20added%20as%20an%20external%20user%20in%20the%20tenant%20first.%20Sign%20out%20and%20sign%20in%20again%20with%20a%20different%20Azure%20Active%20Directory%20user%20account.%3C%2FSPAN%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-2189250%22%20slang%3D%22en-US%22%3ERe%3A%20scheduling%20%26amp%3B%20cancelation%20in%20MS%20learning%20is%20not%20let%20me%20and%20throws%20below%20error%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2189250%22%20slang%3D%22en-US%22%3ESign%20in%3CBR%20%2F%3ESorry%2C%20but%20we%E2%80%99re%20having%20trouble%20signing%20you%20in.%3CBR%20%2F%3E%3CBR%20%2F%3EAADSTS50020%3A%20User%20account%20'xxxxxxxxx%40gmail.com'%20from%20identity%20provider%20'live.com'%20does%20not%20exist%20in%20tenant%20'Microsoft%20Services'%20and%20cannot%20access%20the%20application%20'b9c392b1-7049-4d6c-86bf-9bb91214900d'(Microsoft%20Learning%20Identity%20Service)%20in%20that%20tenant.%20The%20account%20needs%20to%20be%20added%20as%20an%20external%20user%20in%20the%20tenant%20first.%20Sign%20out%20and%20sign%20in%20again%20with%20a%20different%20Azure%20Active%20Directory%20user%20account.%3CBR%20%2F%3ETroubleshooting%20details%3CBR%20%2F%3EIf%20you%20contact%20your%20administrator%2C%20send%20this%20info%20to%20them.%3CBR%20%2F%3ECopy%20info%20to%20clipboard%3CBR%20%2F%3ERequest%20Id%3A%20edb7f606-b222-4c8f-9f73-fdd316e70a00%3CBR%20%2F%3ECorrelation%20Id%3A%20a48f85cb-07aa-4554-b23d-89e0adf07260%3CBR%20%2F%3ETimestamp%3A%202021-03-06T00%3A03%3A57Z%3CBR%20%2F%3EMessage%3A%20AADSTS50020%3A%20User%20account%20'xxxxxxx%40gmail.com'%20from%20identity%20provider%20'live.com'%20does%20not%20exist%20in%20tenant%20'Microsoft%20Services'%20and%20cannot%20access%20the%20application%20'b9c392b1-7049-4d6c-86bf-9bb91214900d'(Microsoft%20Learning%20Identity%20Service)%20in%20that%20tenant.%20The%20account%20needs%20to%20be%20added%20as%20an%20external%20user%20in%20the%20tenant%20first.%20Sign%20out%20and%20sign%20in%20again%20with%20a%20different%20Azure%20Active%20Directory%20user%20account.%3CBR%20%2F%3EAdvanced%20diagnostics%3A%20Enable%3CBR%20%2F%3EIf%20you%20plan%20on%20getting%20support%20for%20an%20issue%2C%20turn%20this%20on%20and%20try%20to%20reproduce%20the%20error.%20This%20will%20collect%20additional%20information%20that%20will%20help%20troubleshoot%20the%20issue.%3C%2FLINGO-BODY%3E
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 identity provider 'live.com' does not exist in tenant 'Microsoft Services' and cannot access the application 'b9c392b1-7049-4d6c-86bf-9bb91214900d'(Microsoft Learning Identity Service) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account.

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AADSTS50020: User account 'xxxxxxxxx@gmail.com' from identity provider 'live.com' does not exist in tenant 'Microsoft Services' and cannot access the application 'b9c392b1-7049-4d6c-86bf-9bb91214900d'(Microsoft Learning Identity Service) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account.
Troubleshooting details
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Request Id: edb7f606-b222-4c8f-9f73-fdd316e70a00
Correlation Id: a48f85cb-07aa-4554-b23d-89e0adf07260
Timestamp: 2021-03-06T00:03:57Z
Message: AADSTS50020: User account 'xxxxxxx@gmail.com' from identity provider 'live.com' does not exist in tenant 'Microsoft Services' and cannot access the application 'b9c392b1-7049-4d6c-86bf-9bb91214900d'(Microsoft Learning Identity Service) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account.
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Are you still having issues? I would recommend reaching out to certification support - https://aka.ms/mcpforum