You can use virtually any data source through ODBC with the Org Chart
wizard. You need to have a single record for each entity with a unique id
field (can be name, employee id, anything that is completely unique), and
each entity has to have a Manager / Reports To relationship with one other
record in the data set - except for the top level, of course.
There is an Office Online article which is a great resource for use of the
Import Wizard :
http://office.microsoft.com/en-gb/visio/HA011822551033.aspx
Barb Way
Product Support - Visio
Microsoft Corporation
[This posting is provided "As Is" with no warranties, and confers no
rights.]