Post Office 365 migration- Inbox renamed to "Archive"
Somehow after a user's mailbox was migrated to Office 365 from on premises Exchange, the "Inbox" folder was renamed to "Archive".
It's still unclear how the change happened. I've never encountered this issue in the past and I'm still not sure exactly what happened within the Outlook client that caused this to occur. I did find out later from the onsite IT staff there was a litigation hold on the mailbox at the time of migration.
Luckily enough I found this article on the matter- https://support.microsoft.com/en-us/help/2826855/folder-names-are-incorrect-or-displayed-in-an-incorrect-language-in-ou
Method 4 worked like a charm for me.
Hope this helps someone with this bizarre issue.