Which Identity Management you are in to?
Is it the CA,Oracle,SUN or something else?
If you are a tester, why you want to learn the product?
Just learn of about
What is Identity Management?
How it is configured?
What is the domain of about?
Who is your client and how the IDM is going to help them?
And many more questions like this...
Identifying the individuals with a unique criteria like the SSN/National ID/ First name with Date of Birth.
Once the identity is saved in the system then as accordingly the policies and validations will be given to that individual as per the identity.
And many concepts/technologies will be used in the IdM . Hope you get the books/materials regarding the Novell Identity Manager. Just read them or Google and get the information.
If you have any doubts after reading those, you can get back to us on a specific terminology or functionality. We can discuss in detail..