Which two solutions should you recommend?

You have a Microsoft 365 environment that contains 1,000 mobile devices.

You need to recommend a solution to prevent all the mobile devices that use the Exchange ActiveSync protocol from authenticating by using Basic authentication.

Which two solutions should you recommend? Each correct answer presents a complete solution. NOTE: Each correct selection is worth one point.
A . Configure the CAS mailbox settings for each mailbox.
B . Implement Azure Multi-Factor Authentication (MFA).
C . Create an authentication policy.
D . Create a conditional access policy.
E . Create a device access rule.

Answer: C,D

Explanation:

References:

https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/disable-basicauthentication-in-exchange-online

https://docs.microsoft.com/en-us/azure/active-directory/conditional-access/block-legacy-authentication