I lost my sub folders in my Outlook account and have since fixed the Outlook issue. However, I need to still locate some subfolders. I went to the Xfinity email site, but sub folders after March, 2018 are not there. Anywhere else to look?
Do you have the account enabled in Outlook using IMAP? If so, any folders you have should appear both in Outlook and in the webmail. Are you sure the ones you are looking for are not just "nested" under other folders? In the webmail UI, look for any small black arrowheads to the left of other folders and click on them.