Welcome to the Xfinity Forum, and thank you for posting your question! To access the HBO Max on Flex or X1, you’ll need:
To find HBO Max in the X1 and Flex Apps menus, you can:
You’ll also see HBO Max TV shows and movies in your search results if you’re browsing on Flex or X1 or using the Voice Remote to say "HBO Max."
Primary Xfinity users can sign into the HBO Max website and app using their Xfinity ID and password on any supported device. Secondary Xfinity users will need to use the HBO Max account and password created and provided by the Primary user. Learn more about creating an HBO Max account. Please let us know if you have any other questions we can help you with.