How to query the email of a user's manager from the Manger attribute in Active Directory?

Does any one know how to query the email of a user's manager from the Manger attribute in Active Directory?

I am using the Provisioning script editor. By using manager = source.Get('manager'); I am able to get the Manger's CN (CN=Manger's LastName\, FirstName,OU=SomeOU,OU=DOMAIN,DC=com).  Is there a way to query the email of the manager?