The account does not have the permission to impersonate the requested user

[Ilse]

We had a working installation, but recently we have been getting an error when accessing mailboxes through a service user.


20240906 10:27:42 SRVC ERROR 5 EWSConnection:TestingImpersonation: (SmtpAddress)............... The account does not have permission to impersonate the requested user.
Please refer to: https://www.somebytes.com/en/products/e ... rsonation/
20240906 10:27:42 SRVC ERROR 5 EWSConnection:configured service doesn't work.

[Ariane]

Hi Ilse, I had the same problem and it's because Microsoft is slowly turning the ApplicationImpersonation feature off.
See: https://techcommunity.microsoft.com/t5/ ... -p/4062671

So now you have to register your application in Azure, you can find the instructions here: https://www.somebytes.com/en/support/fa ... plication/