- Outlook creates a local, read-only folder and then retrieves free/busy information for that mailbox by using Exchange Web Services (EWS).
- Outlook almost immediately tries to connect to that mailbox.
- If the connection is successful, and if the user has folder-level or Full Access permissions to the mailbox, Outlook displays the full calendar details and provides the appropriate access level to the user for the folder. For example, a user who has Editor permissions to the calendar folder can create items on the calendar.
Outlook 2016 and 2013 do not prompt for credentials if the user doesn’t have permissions to the target mailbox or calendar folder.
If Modern Authentication is being used when you connect to Exchange vNext, there may be some problems authenticating by using the legacy authentication stack to the dedicated environment. Users may find that they intermittently only see free/busy data.
Article ID: 3187044 - Last Review: May 24, 2017 - Revision: 4