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- Exchange Domain is the NTLM domain used to authenticate the accounts against
- Host is either the autodiscover host or the EWS host.
- Autodiscover - set to true if the host entered is the hostname to initiate the autodiscover process with, false if the hostname is the host running EWS. For outlook.com, you would set autodiscover=true and hostname=www.autodiscover.com and the correct EWS host will be found for each user account.
- Username suffix is the suffix to append to the username to obtain an email account login id. Useful if the username is obtained from the uPortal login; e.g. @usd.edu
- Use mail attribute instead of username+suffix (2.1.1-M4+) - set to true primarily for Office365 when the 'mail' user attribute is more accurate than username+suffix. This can happen when users get married or other events and their username is not as correct as the mail attribute email address. If set for on-premise EWS the username part of the mail user attribute would be used for the userId instead of the username (not a common situation).
- Inbox folder name is the name of your email's inbox. For EWS integrations most likely the name is Inbox (not INBOX). If this field is not populated or filled out incorrectly, the portlet will fail to render for the user.
v2.01.4 1 and later: 
Linking
- Link Service - enter the https URL of a web email client to open in a new window (does not attempt to do single sign-on)
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