We use and provide services that leverage the application authentication method of the ExchangeOnlineManagement PowerShell module. The latest stable version of the module, 3.5.1, breaks this functionality.

Additionally, any errors are unavailble as they are now behind a GDPR compliant error message:

OperationStopped: IDX12729: Unable to decode the header ‘[PII of type ‘System.String’ is hidden. For more details, see https://aka.ms/IdentityModel/PII.]’ as Base64Url encoded string.

There does not appear to be a way to disable the PII bit through the PowerShell Module to troubleshoot this either.

We have reverted to v 3.5.0 to continue to be able to use our current scripts and processes.

​We use and provide services that leverage the application authentication method of the ExchangeOnlineManagement PowerShell module. The latest stable version of the module, 3.5.1, breaks this functionality.Additionally, any errors are unavailble as they are now behind a GDPR compliant error message:  OperationStopped: IDX12729: Unable to decode the header ‘[PII of type ‘System.String’ is hidden. For more details, see https://aka.ms/IdentityModel/PII.]’ as Base64Url encoded string.  There does not appear to be a way to disable the PII bit through the PowerShell Module to troubleshoot this either.We have reverted to v 3.5.0 to continue to be able to use our current scripts and processes.  Read More

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