However, any edits you make will only be local edits—other people who share the calendar will not see your edits.
Sometimes I can remove the mailbox and re-add it and it starts working but not always.When accepting a shared calendar, you might see an HTTP 500 error. If you see the error more than once, contact Support.Select Accept again and Outlook should successfully accept the invitation. Mail for Windows 10 does not prevent you from editing a calendar to which you only have read-access.half of the users could not book the calendar even though they had owner rights in the group.We had to rebuild their outlook profiles to get the shared calendar to work.We're working on fixing this so that you can edit a shared calendar immediately after accepting the invitation.If a tenant doesn't use Office 365 EOP filtering (the MX record points to a non-Office 365 endpoint), instant syncing will not occur.This is a small law firm that handles all of their bookings through the shared law firms calendar, and within 2 days they had 5 meetings double booked due to the shared calendar not updating in peoples outlook desktop.The group was set up and the calendar added under everyones outlook calendar tab. I have attempted to put Outlook 2013 in cached mode and without and still no change.This is only effecting 1 user out of 5 and the other 4 aren't having any issues and all 5 machines are configured the same.