Client on Office 365 for business. One user account reports that four email folders disappeared on Monday morning. They were available in Outlook the week prior but are now gone.

User says she did not delete any folders. They do not appear in Deleted Items and they are not hiding as subfolders in other folders.

Logged on to Outlook on Office 365 for this account and the folders are not there...same as in Outlook on the desktop.

How can I find and recover these lost folders?

Thanks.

Well since O365 is based upon Exchange 2013;

1. when folders are deleted the first stop is the deleted items folder (Unless they were hard deleted i.e. SHIFT+DELETE
2. I assume you already looked there, however just for the sake of this discussion once the deleted items folder is emptied OR if the folders were hard deleted the folder structures are permanently deleted, however the items within the folders are retained within the "Recoverable Items Folder"
3. Assuming that you already checked the deleted items folder and nothing was there then the only thing you can do it recover the items.

Heres a link on that subject with official response from MS https://community.office365.com/en-us/f/148/t/168375