To get the correct value for the Host and Tenant connection properties, please follow this link: CData ODBC Driver for Workday - Host 
 
All you have to do is log in to your workday account and navigate to View API Clients. 
 

 
 
In the listed values, find the Workday REST API Endpoint. 
 

 
 
Please refer to our documentation for more assistance with the driver: CData ODBC Driver for Workday - CData ODBC Driver for Workday 

Please reach out to [email protected] if this does not resolve the problem for you.