The message appears when FreePBX is attempting to load the calendar list (after I click autodetect)
I tried to look in the different logs but I didn’t find anything.
Actually, i didn’t add it as an iCal calendar, I chose Remote Outlook. I typed in my Office 365 user and password and the EWS Server URL was correctly detected.
If I have to chose an ICS calendar (which I will try tomorrow), what does “Remote Outlook” mean ?