In order for a partner to be able to access the Partner portal, an admin user will need to create two things:
Partner Profile. Learn more about creating a Partner profile.
Partner User Profile. Learn more about creating a Partner User profile.
Once you have created those two, your partner user will be able to log into the partner portal using the appropriate email address.
All users can log into your Hanover system from the same URL. Typically, it has the following format...
www.[your company name].hanovercrm.com