AzureDevOps source code decoration fails behind company proxy with authentication

Hi,

we are using the SonarQube Developer EditionVersion 7.9.1 (build 27448) and have Problems with Azure DevOps source code decorations. Our Installation is behind a company proxy server and we set up the proxy server configuration in the sonar.properties file as follows:

sonar.web.javaAdditionalOpts=-Djdk.http.auth.tunneling.disabledSchemes=""

http.proxyHost=ourServer
http.proxyPort=8080
http.proxyUser=ourUser
http.proxyPassword=ourPassword

https.proxyHost=ourServer
https.proxyPort=8080
https.proxyUser=ourUser
https.proxyPassword=ourPassword

This works very well for the Sonar Marketplace to download plugins, but when we run a build in AzureDev Ops we get the following error in ce.log file:

Failed to decorate Azure DevOps Pull Request: API resource location 225f7195-f9c7-4d14-ab28-a83f7ff77e1f is not registered on https://draeger.visualstudio.com/. HTTP 407 authenticationrequired

I think that the compute engine ignores the authentication. How can i work around this problem?

Thanks and best regards.

/legacycode