The first is security. Enterprise documents are the lifeline. If you don't feel safe, don't say anything else.
The second is collaboration. Enterprise documents are not personal documents, and the core value of enterprise document management lies in document collaboration among enterprise employees. Many people enjoy it, such as version management, online editing, remote interaction and so on.
Third, anytime, anywhere, management is getting faster and faster, and supporting mobile and various devices is a necessary condition for enterprise document management.