Outlook Calendar Not Syncing With Google Calendar? Here's the Fix

If you pasted your Outlook or Microsoft 365 calendar link into Google Calendar and nothing showed up — or it appeared once and then stopped updating — you are not doing anything wrong. The problem is the calendar feed Microsoft hands you.

Why it happens

Microsoft 365 publishes calendar feeds (ICS files) using Windows time-zone names like W. Europe Standard Time instead of the standard IANA names (Europe/Berlin) that the rest of the world uses. It also emits timestamps in a way Google Calendar's subscription parser doesn't fully accept.

The result is one of three things:

• Google refuses to add the calendar at all.
• The calendar adds, but stays empty.
• Events appear, but at the wrong time.

This is not a setting you can toggle off in Outlook. The feed itself has to be rewritten into clean, standards-compliant ICS.

The fix

CalConverter takes your Microsoft 365 ICS link and serves back a normalized feed that Google accepts and keeps refreshing automatically.

Step by step

1. Publish your Outlook calendar. In Outlook on the web, go to Settings → Calendar → Shared calendars, publish your calendar with "Can view all details", and copy the ICS link.
2. Convert it. Paste that link into CalConverter and copy the Google-compatible URL it returns.
3. Subscribe in Google Calendar. In Google Calendar, open Other calendars → Subscribe from URL, paste the converted URL and save.

If it stops updating later

Google refreshes subscribed calendars on its own schedule (often every several hours), so changes are not instant. If updates stop entirely, the most common cause is that the original Outlook publish link was reset — re-publish the calendar in Outlook and convert the new link again.