Caution: Dual Authentication (2FA) must be disabled for the user you connect to Signitic.
Log in with an administrator account to Outlook 365. Then go to the "Admin".
Warning: If the Admin icon is not visible, that means that your account is not admin.
Create a new specific user for Signitic on the Outlook 365 control panel.
Fill in some basic information and enter signitic as username.
Add a product licence to the user.
Add Exchange administration permissions to the user. This will allow the connection between Signitic and Office 365.
Tip: If you already have an user with that exact role: Exchange admin, you can use it to connect your Office 365 directory to Signitic and jump to step 7 without going through the creation of a new user.
Finalize the creation of the user and go to the Signitic Office 365 connectors settings.
Enter credentials of the new Office 365 user in Signitic.
You can update your signatures with the button "Force signature update" available on the dashboard.
Refresh your Outlook web to discover your new signature!