Forum Discussion
On prem users unable to load 365 user's calendars
I am having an issue where Exchange on prem users are unable to open calendars from 365 users. They are able to add the calendar in Outlook, but at the top of the calendar it says "could not be upda...
Unless I am not reading that link right, it talks about send as and delegation. They are just trying to view a user's calendar in Outlook. This is simply a user given viewer permissions on a calendar trying to view it.
Again it depends what the users are trying to do. If they are loading a calendar in Outlook, then that's a bit different then viewing free/busy information in a meeting invite. Specific calendar permissions used when opening a calendar in Outlook are considered folder permissions which comes under the "not supported" section. If it's free/busy you have an issue with, then you can troubleshoot that here https://learn.microsoft.com/en-us/exchange/troubleshoot/calendars/troubleshoot-freebusy-issues-in-exchange-hybrid