Outlook calendar shared not updating
We're working to make it possible to edit shared calendars in Outlook 2016 for Windows.
To edit a shared calendar, go online to your own calendar, open Calendar for Windows 10, or use a mobile device. Last updated: May 2, 2017 ISSUE When you try to accept a shared calendar using your Office 365 for business account in Outlook 2016, you might receive the "Something went wrong" error or your sign-in might fail.
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.
Instead, calendar syncing will only occur a couple of times per day.
However, any edits you make will only be local edits—other people who share the calendar will not see your edits.
STATUS: WORKAROUND To access the calendar shared with your Office 365 for business account, you’ll need to accept the invitation from Outlook on the web .
If you've already clicked the Accept button in Outlook 2016, you won't be able to re-accept the invitation in Outlook on the web.
You will be able to edit the calendar about four hours after accepting the invitation.
We're working on fixing this so that you can edit a shared calendar immediately after accepting the invitation.
After you set up an @email address, you can make the Mail option available when you close and reopen i Cloud for Windows.