Most Likely: It Just Got Unpinned
Teams updates can sometimes remove pinned apps from your sidebar. The fix takes about 30 seconds.
- On the left sidebar in Teams, click the three dots icon (More apps)
- Search for Calendar
- Right-click it and select Pin
If Calendar doesn’t show up in the app search at all, the issue is one of the causes below — not a pinning problem.
Check Your Microsoft 365 License
This one surprises people. The Teams calendar requires an Exchange Online mailbox. If your plan doesn’t include it, the Calendar app simply won’t appear.
Plans that include Exchange Online:
- Microsoft 365 Business Basic, Standard, or Premium
- Enterprise E1, E3, E5
Plans that don’t include Exchange Online (no Teams calendar):
- Microsoft 365 Apps for Business
- Free Teams accounts
If you’re on one of the plans without Exchange, upgrading is the only fix.
IT Admin Policy
In work environments, IT admins can restrict which Teams apps are available. If the Calendar has been disabled by policy, you won’t be able to add it yourself regardless of your license.
An admin can enable it via: Teams admin center > Teams apps > Setup policies — edit the relevant policy to include Calendar.
Update the Teams Client
An outdated client can occasionally cause apps to not show correctly.
Profile picture (top right) > Check for updates
If you’re using the Teams web app, try switching to the desktop client.
Clear the Teams Cache
Last resort, but it works when nothing else does. A corrupted cache can cause apps to disappear.
- Fully close Teams
- Press
Win + R, type%appdata%\Microsoft\Teams, press Enter - Delete the contents of:
Cache,Blob_storage,databases,Local Storage - Reopen Teams
Your messages and files are stored in the cloud — this only clears local cached data.