With the release of the Mojave version on Mac, your app can't interact with Outlook. After having done the migration through Mojave, the app will trigger notifications to ask some rights.
By clicking on Ok, you authorize Letsignit to pull your signatures / campaigns in your mail's client.
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You can also find those authorizations directly on your Mac in the "Safety and privacy" section, then in "Automatization" > "Privacy" > "Letsignit App", then tick the two boxes bellow:
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When it is done, you can refresh your app and then close / open Outlook to benefit from your updated signature / campaign :)

#mac #mojave #authorisation