Import Public Folders from pst file

I am trying to import our Exchange 2007 public folders into our managed Exchange 365 account at Microsoft.  I created the Primary Hierarchy public folder name, PublicFolders, but don't understand how to use pst import to get the public folders under this main folder.  All I have accomplished thus far is to use Outlook to import the public folders into the administrator Outlook account on the managed Microsoft O365 server.  They import into a folder called IPM_SUBTREE in the administrator mailbox on the server.  Do I somehow have to move the public folders from there to the actual public folder location?  I really need and appreciate any help.