Get-M365CommonEndpointList and Get-IntuneEndpointList functions do not use the detected proxy and fail if proxy is needed.

[cheskote]

While function Test-DeviceIntuneConnectivity checks if there is a configured proxy and calls Invoke-WebRequest accordingly, the required previous functions Get-M365CommonEndpointList and Get-IntuneEndpointList call invoke-restmethod without using the proxy. So both functions fail.

[cheskote]

fixed it in my environment changing:

Function Get-M365CommonEndpointList {
    # Get up-to-date URLs
    $endpointListM365 = (invoke-restmethod -Uri ("https://endpoints.office.com/endpoints/WorldWide?ServiceAreas=Common`&clientrequestid=" + ([GUID]::NewGuid()).Guid)) | Where-Object { $_.ServiceArea -eq "Common" -and $_.urls }

to:

Function Get-M365CommonEndpointList {
	# Get up-to-date URLs
	 if ($ProxyServer -eq "NoProxy") 
	{
		$endpointListM365 = (invoke-restmethod -Uri ("https://endpoints.office.com/endpoints/WorldWide?ServiceAreas=Common`&clientrequestid=" + ([GUID]::NewGuid()).Guid)) | Where-Object { $_.ServiceArea -eq "Common" -and $_.urls }
	}
	else 
	{
		$endpointListM365 = (invoke-restmethod -proxy $ProxyServer -Uri ("https://endpoints.office.com/endpoints/WorldWide?ServiceAreas=Common`&clientrequestid=" + ([GUID]::NewGuid()).Guid)) | Where-Object { $_.ServiceArea -eq "Common" -and $_.urls }
	}

and replacing:

Function Get-IntuneEndpointList {
    # Get up-to-date URLs
    $endpointList = (invoke-restmethod -Uri ("https://endpoints.office.com/endpoints/WorldWide?ServiceAreas=MEM`&clientrequestid=" + ([GUID]::NewGuid()).Guid)) | Where-Object { $_.ServiceArea -eq "MEM" -and $_.urls }

by:

Function Get-IntuneEndpointList {
	# Get up-to-date URLs
	 if ($ProxyServer -eq "NoProxy") 
	{
		$endpointList = (invoke-restmethod -Uri ("https://endpoints.office.com/endpoints/WorldWide?ServiceAreas=MEM`&clientrequestid=" + ([GUID]::NewGuid()).Guid)) | Where-Object { $_.ServiceArea -eq "MEM" -and $_.urls }
	}
	else 
	{
		$endpointList = (invoke-restmethod -proxy $ProxyServer -Uri ("https://endpoints.office.com/endpoints/WorldWide?ServiceAreas=MEM`&clientrequestid=" + ([GUID]::NewGuid()).Guid)) | Where-Object { $_.ServiceArea -eq "MEM" -and $_.urls } 
	}