We are trying to develop an Outlook Web Add-In but have a few queries related to EWS:
That documentation states that EWS must be enabled and must be exposed to the internet for on-premises installations of Exchange Server.
Questions:
- Do all Office Web Add-Ins require EWS to be enabled on the server?
- Is it mandatory for EWS to be exposed to the internet for Add-Ins to work?
Our customer has an on-premises installation of Exchange Server and has EWS enabled, but does not want to expose it to the internet for security reasons.
The Add-In we are trying to develop is for internal employees only and will not be accessed from outside the company network zone.
