Universal Containers (UC) is successfully using Delegated Authentication for their Salesforce users. The service supporting Delegated Authentication is written in Java. UC has a new CIO that is requiring all company web services be REST-ful and written in .Net.
Which two considerations should the UC Architect provide to the new CIO? (Choose two.)

Universal containers (UC) has a mobile application that calls the salesforce REST API. In order to prevent users from having to enter their credentials everytime they use the app, UC has enabled the use of refresh Tokens as part of the salesforce connected App and updated their mobile app to take advantage of the refresh token. Even after enabling the refresh token, Users are still complaining that they have to enter their credentials once a day. What is the most likely cause of the issue?

The security team at Universal Containers (UC) hasidentified exporting reports as a high-risk action and would like to require users to be logged into Salesforce with their Active Directory (AD) credentials when doing so.
For all other users of Salesforce, users should be allowed to use AD Credentials orSalesforce credentials. What solution should be recommended to prevent exporting reports except when logged in using AD credentials while maintaining the ability to view reports when logged in with Salesforce credentials?

How should an Architect force users to authenticate with Two-factor Authentication (2FA) for Salesforce only when not connected to an internal company network?

Universal Containers (UC) has a Customer Community that uses Facebook for Authentication. UC would like to ensure that Changes in the Facebook profile are reflected on the appropriate Customer Community user:
How can this requirement be met?