Jan is correct. You'll need names of the form fields associated with the username, password and domain. You also need the URL of the form where users enter their credentials and the URL of that form's action.
Once you have those five elements, create a new SSO Form POST policy.
1. In the Resource field, enter the login form URL.
2. Under Roles, choose the appropriate role.
3. For Action, select "Perform the POST defined below".
4. In the POST to URL field, enter the URL of the form action.
5. Next, you'll need to add your domain field: Under "User label", enter a label that has meaning for you. Under "Name", enter the name of the domain field in your form. Under "Value", enter the name of the domain in your Deltek system.
6. Modify the username and password Names, if necessary. Do not modify the values.
7. Click Save Changes/
I've attached a screenshot as an example. In my example, the URL of the login form is http://webapp.initech.net/login.aspx and the form's action URL is also http://webapp.initech.net/login.aspx. My form field names are username, password, and domain.
