Posting word document to Teams with links within the document and to external docs......

I am relatively new to Microsoft Teams and the whole Office 365 environment. I am looking for information on how we can better utilize the Teams program for our company. One of the things I want to be able to do is include our Policies and Procedures manual into the file feature of Teams. This document is pretty lengthy with may links to sections within in the document and to external files/forms. We currently have it setup and working within our network environment. But adding to Teams breaks the links. Is there any documentation that shows how something like this can be done? Or is there a better way I can do this?