
I finally figured out how to see these folders and take some action on those conflict emails.

The folder names I found in the Mailbox Cleanup are as follows: After running the Mailbox Cleanup tool in Outlook and looking through the size of each folders, I noticed the 3 folders which are having too many emails but I cannot see those folders in the Outlook thus not able to clear those unwanted mails. Recently I have been getting warning in my Outlook saying the mailbox is full, even after clearing and archiving most of the older emails.
