Q: When I connect to a Windows machine from a Linux machine using PAS Manager, login with Microsoft OAuth and it shows error “Unable to acquire access token – Unable to open default system browser”. How can I solve this issue?

A: This error displays when PAS Manager is having difficulty to get credentials information from Microsoft website using default web browser on Linux (in this case Firefox)

To solve this issue, you need to open few websites through command line using Terminal. We use www.qoppa.com as an example

  • Open Terminal
  • Enter xdg-open “https://www.qoppa.com/”

    and notice that it will launch Firefox web browser and go to www.qoppa.com
  • Close Firefox browser
  • Enter /snap/bin/firefox “https://www.qoppa.com/”

    and notice that it will launch Firefox web browser and go to www.qoppa.com again
  • Close Firefox browser
  • Go back to PAS Manager and try to login with Microsoft Auth again and it should take you Microsoft website where you can enter your credentials, then the token cache will be saved on the server.