Calendar Link

Hello everyone! 

I am trying to support a user with an issue they are having with the calendar feature in their Zoom desktop application. The user is signed in with their work account, Zoom Outlook plug-in is installed, but I cannot connect the Outlook calendar to their Zoom desktop app. I clicked the "Add Calendar" option to link it, but a Window pops up saying the admin needs to grant access for this feature. On the back end, I don't see a setting to change for this. Anyone know what setting this might be?