Hi @zlannin
The best solution in this case would be to set up a custom link for the activation email from Admin >> Settings >> Email & SMS >> User Activation (if you are using the developer console, please hover over Developer Console on top left side of the screen and switch to Classic UI) to redirect to an endpoint like
https://company.com/activate?token=${activationToken}
On the /activate endpoint, you can take the value from the query parameter and activate the user using a query like the one available here.