Modern authentication is the more secure of the 2 ways Print and Delivery can communicate Microsoft Exchange. This also makes the setup of Modern authentication exchange connection more complicated as it requires an App in Azure Active Directory (how to setup app in Azure active directory)
The Client and Tenant id needs to be filled in order for the exchange configuration to work and can be found in the required app for a modern authentication flow
To change the user credentials an exchange configuration you can double click and in the credentials column to open the change credentials window.
NB: A Modern authentication setup will only work with an Office365 Exchange and not with on premise
NB: it is not possible to specify a custom From mail in modern authentication (it will always use the mail used in credentials)