The best practice to get
around this issue is to mirror the unsupported data source onto a support data
source, so you can place the data you want to analyze in a form that Tableau
Desktop can properly connect with. The article below goes into more detail on
this issue and using an ODBC connection:
'Connections to Unsupported Data Sources'
'Ideas'
LDAP (OLE DB/ADO) data connector for analytics