Yes, Signatures for Office 365 guarantees that all mobile devices that send email via Office 365 will have the same high-quality email signatures as desktop users.
Users don't need to login to applications like OWA, Outlook for iOS or Outlook for Android either to get signatures added to their emails.
Among the mobile devices that will receive email signatures are:
- Windows smartphones and tablets.
- Apple iPhones and iPads.
- Android smartphones and tablets.
- BlackBerry® devices.