- Time Created value on new surveys
- .onebin files
- Add shortcut to My files in OneDrive for Business
- All day events in a modern site calendar
- Allow users to order items in this view
- App webs are not supported for migration
- Association Columns
- Barcode Enabled Libraries or Lists
- Business connectivity services (external data)
- Cannot detect feature when doing pre-migration check
- Content Organizer Settings and Rules
- Content Search WebParts in Advanced Mode
- Copy Teams using Single Sign-on (SSO)
- Copying items that contains circular self-lookup in their past versions using Insane Mode
- Copying pages using taxonomy navigation
- Custom Features, Third Party Web Parts, and Apps
- Custom permissions on groups from SharePoint 2003 are not fully supported
- Discussion List form migration is not supported
- Document IDs
- Document Information Panel is not supported
- Document Sets
- Editing Pages Migrated to a Library Other than Site Pages
- Event Receivers
- External Sharing Links
- External users are not preserved
- Fab 40 templates
- Files shared with a link, Google Drive files, and shared files/folders
- Folder versions are not supported
- Globally reusable workflows
- Google shared drives are not supported