ISSUE: MS Graph error during domain scan 'GetInitialDomains_WithGraph - /0 EXCEPTION'
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Overview
The Exchange logs show the error below during the domain scan.
T:48 |GraphExecutionBase`2 | ||0 |d06da597-b82c-45e4-8b93-e3945e87901e| ||An error occurred for GetInitialDomains_WithGraph - /0
EXCEPTION: Microsoft.Kiota.Abstractions.ApiException: The server returned an unexpected status code and the error registered for this code failed to deserialize: 407
The error above does not provide sufficient information, however, a deeper look into the 407 can be the following:
The HTTP 407 Proxy Authentication Required client error status response code indicates that the request has not been applied because it lacks valid authentication credentials for a proxy server that is between the browser and the server that can access the requested resource.1
Solution
Confirm there is no proxy configuration by running the command below on the bridgehead.
netsh winhttp show proxy
If there is a proxy that cannot be removed, we require the proxy to be unauthenticated or it will not allow our software to function properly.