Other Connection Info (EWS Only)

Impersonate User (Email)

Check this if the login email address does not have a mailbox and/or it cannot impersonate room mailbox accounts.  The email user specified must have ApplicationImpersonation permissions.

Also, if you are using OAuth to connect, you must enable Impersonation and enter an email account that has a mailbox.

AutoDiscovery URL

Enter the URL to the Exchange Web Services.  If you don’t know this up front, you can leave it blank and hit the “Test” button.  An attempt will be made to find the URL automatically.  Note: This method of discovery will take several minutes.

For Office365 users, the default is:  https://outlook.office365.com/EWS/Exchange.asmx

Target Exchange Version

This tells the client to target a certain version of the EWS API.  Select the closest option to your Exchange Server version.