We are testing new Outlook at the moment, and we've come across an issue with the M-Files add-in. When we try to connect to the vault, we get the following error:

I have checked the developer tools, and I can see a failed POST request to https://<domain>/grpc/v1/get-authentication-configuration 404 (Not Found) when the connection fails.
We're using gRPC on the server, and it's working correctly for everything else. Is there some extra configuration that needs to happen to get the addin working?
