Download the Outlook plugin by clicking on the button below :
Place the Signitic.app application in the Applications folder.
Launch the application and log into your user account.
Open Outlook and go to the menu: Outlook > Preferences > Signatures
If the signature is not updated and/or the upload is running in a vacuum, open "System Preferences" on your Mac, click on the "Security and Privacy" icon and check that in "Automation" the boxes related to Signitic are checked.