Go to the 'Admin'-settings in the upper right-hand corner, and through the left-hand menu, choose 'App catalog' under Integrations.
Choose the integration you're looking for, and follow the instructions on the page.
If you have any problems or need further information about each integration, installation process, etc.; check the matching article in help center. In the case you still can't find the answer, please do not hesitate to reach out to us through the chat found in the lower right-hand corner of your screen.
These settings are only available to administrators of the organization.