Last updated: May 2, 2017 Currently, you can't use Outlook on Windows to edit calendars that are shared with your account, even if you've reconnected your account to Outlook.We're working to make it possible to edit shared calendars in Outlook 2016 for Windows.When the Directory Server (LDAP) information is configured correctly in the account settings, the functionality is enabled for directory lookups, but Outlook will repeatedly display an error code 17768.We have contacted Microsoft about this and This will also prevent direct GAL lookups.Typically this happens when running Outlook 2016 in cached mode with exchange or Office 365.

Mac users must grant the "Reviewer" role to Outlook 2011 users.

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.

The person who sent you the invitation will need to remove your permissions and then send a new invitation.

Last updated: May 2, 2017 To ensure that your calendars and email sync correctly, reconnect your account to Outlook for Windows.

For detailed instructions, see Reconnect Outlook 2016 or Outlook 2013 to for uninterrupted email access.