Microsoft 365 Group Calendars don’t show up (Microsoft Graph)

Microsoft 365 “Group Calendars” require explicit support and permissions when syncing via Microsoft Graph.

What to check

1. Confirm you’re using an Office 365 (Microsoft Graph) account in BusyCal (not legacy Exchange/EWS).
2. When adding the Microsoft Graph account, make sure Enable access to Group Calendars is enabled during the setup flow.

If the account was added without group-calendar access, you may need to remove and re-add the Microsoft Graph account to grant the required permissions.

Admin consent note

Some organizations require an administrator to grant Microsoft Graph permissions. If you see an “Admin Consent Required” prompt, follow the admin guide below.

Related docs

• Using BusyCal with Office 365 (Microsoft Graph): Group Calendars
• How do I setup Microsoft Teams or Graph API access in BusyCal?