Although there are many possible reasons for the Outlook Calendar not syncing with iphoneproblem. The following are some of the most popular explanations:

• If you choose the wrong calendar while adding an event, your Outlook calendar may not sync with your iPhone.

• When data is not properly synced to the server.

• Alternatively, your Outlook account may not be correctly linked to your iPhone.

• The default calendar on iOS is wrongly set.

• Your iPhone may have an incorrect Outlook setting.