Common issues and resolution.
WHAT PROBLEMS RECUR
Sign-in failures Multi-factor authentication difficulties, particularly after changing phone Mail not arriving, or arriving in junk Synchronisation not completing Shared access not working Applications repeatedly requesting credentials
WHAT TO ESTABLISH FIRST
Whether it affects one user or many.
WHY
It separates an account problem from a service or configuration problem.
WHAT TO CHECK NEXT
Service health, which reports platform incidents.
WHAT TO DO ABOUT AUTHENTICATION DIFFICULTIES AFTER A PHONE CHANGE
Have the user register the new device, using an alternative method or an administrator reset.
WHAT TO ADVISE USERS IN ADVANCE
To record recovery information and register more than one method.
WHY
Otherwise a lost phone means an administrator must intervene every time.
WHAT TO CHECK FOR MAIL DELIVERY PROBLEMS
Message tracing, which shows what happened to a specific message.
WHAT TO CHECK FOR SYNCHRONISATION
Available storage, file path lengths, and unsupported characters.
WHAT TO RECORD
Recurring issues, which usually indicate a configuration or training gap.
