Most calendar headaches in Microsoft 365 come down to a handful of recurring problems: a calendar that won’t appear, one that won’t sync with Outlook, or trouble seeing and sharing someone else’s schedule. This hub gathers our Outlook, Teams, Microsoft 365, and SharePoint calendar guides in one place and points you to the exact fix or how-to for your situation.
Calendar not showing, loading, or syncing
When a calendar disappears or stops syncing, work through the most common causes first.
- Teams calendar not showing? 8 fixes — diagnose a missing, stuck, or out-of-sync Teams calendar, fastest fix first.
- Outlook shared calendar not showing — restore a shared calendar that has vanished from Outlook.
Viewing someone else’s calendar
Need to check a colleague’s availability? These guides cover permissions and access.
- How to view someone’s calendar in Microsoft Teams — see a teammate’s schedule directly inside Teams.
- How to view and access someone’s Outlook calendar — request access and open another person’s Outlook calendar.
Adding & overlaying calendars
Bring multiple calendars together so nothing slips through the cracks.
- How to add a SharePoint calendar to Outlook — connect a SharePoint calendar to your Outlook view.
- How to overlay calendars in Outlook — stack multiple calendars in one merged view.
- How to add a Teams calendar to Outlook — surface your Teams calendar inside Outlook.
- Add a multi-source calendar to Microsoft Teams — combine SharePoint, Outlook, and Planner events in a single Teams calendar.
- Display an Outlook calendar on a SharePoint page and display Exchange calendars in SharePoint Online — embed live calendars on your intranet.
Configuring Microsoft 365, Teams & SharePoint calendars
Set calendars up correctly the first time to avoid problems later.
- How to use and configure the Microsoft 365 calendar — core setup for the M365 calendar.
- Microsoft 365 group calendar — give a team a shared group calendar.
- Microsoft Teams channel calendar — add a channel-level calendar for a focused team.
- SharePoint group calendar — work with group calendars in on-premises SharePoint.
Vacation, time off, and migration
Handle the bigger calendar projects — tracking absences and moving platforms.
- Vacation and PTO calendar for Outlook & Teams — track time off in a shared calendar everyone can see.
- Migrating shared calendars from Google Workspace to Microsoft 365 — move calendars cleanly when switching platforms.
Next step: keep your calendar organized
Once your calendars are connected and syncing, a little structure goes a long way. Learn why calendar color coding makes a busy schedule readable at a glance — and consider Virto Calendar to overlay every source into one clean view.