Below are the supported backup source for Office 365 Backup and Restore.
Mailbox Level: Outlook, OneDrive, Personal Site, Public Folders and Site Collections
Folder Level for Outlook Mailbox: Inbox, Drafts, Sent Items, Deleted Items, Archive, Calendar, Clutter, Contacts, Junk Email, Notes, RSS Feeds, Tasks and Trash
OneDrive Items: Folders, Files and Access Permissions
SharePoint Items: Announcements, Assets Libraries, Bright Banner, Calendar, Contacts, Custom Lists, Data Connection Libraries, Discussion Boards, External Lists, Form Libraries, General Settings, Import Spreadsheets, Issue Tracking, Links, Look and Feel, Manage Site Features, Permissions and Management, Picture and Libraries, Report Libraries, Site Collection Features, Site Page, Survey, Version History and Wiki / Page Libraries
Public Folders Level: Folders and Files
Simple backup source selection:
Advanced backup source selection:
There are two (2) ways to select a backup source using the Advanced backup source selection:
Selecting users/folders/items one by one
Selecting multiple users/folders/items using the shortcut function
Note: 200 users/folders/items is only an example. You can increase the number as needed.