Help documentation for integrations will be available directly from central when configuration the integration.
Below is a list of planned help documents that will be available when the Integrations are active in the EAP. (NOTE prior to EAP the links will not bring you to the documentation page)
If you have multiple estates please deploy all integrations on a single estate. See best practices: https://docs.sophos.com/central/customer/help/en-US/ManageYourProducts/ThreatAnalysisCenter/Integrations/IntegrationsSubEstates/index.html
Main integration Help page:
https://docs.sophos.com/central/customer/help/en-US/ManageYourProducts/ThreatAnalysisCenter/Integrations/index.html