Hello everyone,
since we updated your Confluence (Data Center) to the lts version 9.2.0 we have problems with the iCal sync between Confluence and Outlook 2016/Outlook 2024. The Problem still appears with Confluence 9.2.1 (LTS).
If you subscribe an Confluence team calendar with iCal and put the ics file url into Outlook the first sync is working fine. But at different times an windows security popup appears and ask for credentials. Nothing is working here so you can only cancel and the calendar sync can't process. (result: no updated calendar)
In Confluence we have private team calendar url activated so you should not need credentials. Also the first calendar sync after an Outlook restart always works fine.
With Confluence 8.x.x. we had no problems with it.
I hope someone can help.