Best method to delete O365 Exchange online mailbox and create new mailbox

Mark B
Mark B used Ask the Experts™
on
Hello- I am new to O365 administration. I have been test migrating G-Suite gmail date via IMAP with my O365 staff account and I want to permanently delete my mail box and then create a new mail box to have a 100% clean / new mailbox to perform another email migration test from G-Suite. What is the easier way to do this AND to preserve the O365 account? I have One Drive data I need to keep on this account.

I was looking over this, but I'm concerned it will delete my user account and One Drive data:

https://community.spiceworks.com/how_to/104046-completely-remove-mailbox-from-office-365
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