Can Nuxeo DM and Nuxeo DAM run jointly?
If I want to use Nuxeo DAM and Nuxeo DM, can I have both of them running on the same installation and same content repository? Will they share the same users and documents?
Yes and yes.
In a shared repository scenario documents can be created in either of those systems and previewed/manipulated in the other.
The users can be set up in the same database.
Please note that user authentication can also be done via a third-party system or protocol (e.g. LDAP, ActiveDirectory, OpenAuth, etc), while documents can be accessed from other systems, too (WSS Share Point, WebDav, etc).