With ChatGPT Enterprise, how can I provide more context to it by using internal documentation?

With ChatGPT Enterprise, how can I provide more context to it by pointing it to internal documentation, files etc? I believe the API and ChatGPT Enterprise are two different things. With the API it is possible to customise and fine tune the base model, but with just the Enterprise version of ChatGPT, would it be possible to somewhat give the context to it using documents and pointing to knowledge articles?