I want to move my Outlook calendar to Google Calendar. Google asks for an .ics file. I am on Outlook for Microsoft 365 on Windows. How do I save my calendar as ICS?

In classic Outlook for Windows:

1. Go to the Calendar view and select the calendar you want.
2. File > Save Calendar.
3. Under Date Range choose Entire calendar (or a custom range).
4. Under Detail choose "Full details" if you want notes and attendees.
5. Click OK and save the .ics file.

Then in Google Calendar: Settings > Import & export > Import, select the file and the destination calendar.

If you do not see Save Calendar, you may be on the new Outlook. In that case switch back to classic from the toggle in the top right, or use the web option below.

Save Calendar worked. After import Google says "imported 842 of 860 events". What happened to the other 18?

Usually those are events with an unusual recurrence rule, or events that were declined or already cancelled, or a few with broken data. Open the ICS in a text editor, find a missing event by its subject and check for odd fields. For a handful of items it is quicker to recreate them by hand.

If you need CSV instead (for Excel), use File > Open & Export > Import/Export > Export to a file > Comma Separated Values and select the Calendar folder. CSV is good for reading but Google does not import recurring events correctly from it, so use ICS for the move.

18 events were old cancelled ones. All current meetings made it. Thanks!