Outlook Email Color Categories Changed – How can I resolve and figure out how?


I have a shared mailbox at work and we use color categories to organize how we handle emails. For some reason, a category was swapped out for a new one but I am not sure how it happened. For example, emails that had category A no longer have that category assigned and now have category B.

It occurred in all folders so it is not isolated to one. Additionally, the new category does not even exist in the master category list.

Has anyone encountered this and is there an easy way to resolve? I can’t select multiple and reassigned because the majority of emails have more than one category assigned to begin with.

Environment = Office 365 pluspro account

Thanks!