Все, что необходимо сделать, развязывают драйвер прежде, чем сказать VMware захватывать его.
What Visio version? There used to be the "Enterprise Network Tools" addon for older Visio versions, which has been discontinued.
Newer Visio versions do have down-loadable add-ins as well, but these concentrate on Active Directory documentation, not generic LDAP object documentation. You could write an own add-in to connect to a directory and generate a diagram, if you need a custom solution.