Hi all,
Wrote this Exam Prep guide for MS-202 - Messaging Administrator Certification Transition
You can take MS-202 if you have already passed 70-345. Note it is only open for the next few months until Microsoft retire it and MS-200/1 is your only path!
https://microsoft365pro.co.uk/2019/07/03/microsoft-365-messaging-administrator-certification-transit...
Best of luck!
Best, Chris