1. Close Microsoft Outlook, if it’s currently open.
  2. In the Windows search box type %APPDATA%\Microsoft\Signatures and press Enter.
  3. Go to Windows 10 File Explorer and copy all the files and folders in the %APPDATA%\Microsoft\Signatures hierarchy to a safe location of your choice.
  4. That’s all there is to backing up your Outlook email signatures.
  5. to restore them if your profile is deleted or reset, simply copy them from the safe location you selected back in to the above %APPDATA%\Microsoft\Signatures location (outlook may need to be restarted)