Garmin connect calendar will not connect to Microsoft 365

Question

I wanted to link my garmin calendar to my office 365 account but when I try to do it the connection fails with the message unable to connect try again later. 
 The ios app will not connect either when following the instructions on the website.

Garmin - SP · Answer

Please try the Outlook troubleshooting here to see if that could resolve this for you with Microsoft 365. 
 As for with iOS, if these steps Sharing a Garmin Connect Calendar do not work, can you try sending the calendar through your Connect app to your iCal?