Within Teamwork Desk, you can enable Teamwork CRM for your site.
Click your profile icon in the top right of your site and select Settings from the dropdown menu.
Note: Only site administrators can access the Apps settings and enable integrations.
In the Settings area, go to the Apps tab where you will see an option for Teamwork CRM.
Click Enable to turn Teamwork CRM on for your site.
It is also possible to enable Teamwork CRM through your product switcher.
For more information, see: Working with Teamwork CRM