For saving Office 365 user account backup, select Office 365 as the email source option, from the left screen of the software:
As you select the Office 365 as a source, login form will appear at the right panel. Fill the login credentials of your Office 365 account you want to archive or backup.
Once the login is successful, software will start loading all the folders, sub-folders in the Folder List on its left pane.
The software loads and shows the exact structure of folders, labels of the account with accurate message count as shown below -
Now click on Select Saving Options Drop Down Menu to select the desire output option