Server returned NotFound(404) for the address - Citrix issue for Planner add-in

This guide described a known issue and the solution when you're using Citrix to connect to the Planner outlook add-in. Table of contents

• The issue
• The solution

The issue

When the user tries to use the Planner add-in through Citrix, they are met with a box asking them to login. When the user tries to login, they are met with this boxs: The issue happens for all users.

The solution

The users Citrix Internet Explorers privacy settings are set as High, which prevents the use of cookies. Change the setting to Medium/High so that cookies are enabled. Then it will work again. Planner needs cookies to function.