Hi,
What specific operations did you do before this problem occurred?
Can you see your contacts in the Contacts section?
>> When I create a new email, there is absolutely NO email addresses or names saved
Do you mean that there is no contacts address popped up when you click on the "To" field?

Given this situation, it is suggested to exit Outlook desktop client and see if the issue can be reproduced on the web mail.
Any update, please feel free to post back.
Regards,
Aidan Wang
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