I have one team member who cannot access calendars in our Confluence Cloud instance.
He has a license in Confluence and Jira, and is in the group that has permissions in both spaces.
The calendars are not restricted in any way.
I've got Atlassian Support looking into it, but so far they have not had any luck figuring out the issue.
Just wondered if anyone on here had run into something similar and what the issue turned out to be.
