If you, (or your Users, if you are in charge of a Channel) aren't seeing an Opportunities option, make sure the Role has the appropriate Opportunity permissions. Admins can slide the Opportunity feature to the create/own/delete level. You can email Support@Mindmatrix.net, or put in a ticket, for further help or for them to enable this for you or your Users. (Learn more about Opportunities: What are Opportunities?)While creating a new step-wise opportunity type from the Opportunity Custom Fields page (Setup > Custom Fields > Opportunity Custom Fields), you will now see a new option to make associating contacts mandatory for the opportunity.
After clicking on the "Enable Step Process" checkbox, you will see the option "Make association of contact as mandatory step." By selecting "Yes," the system will require users to associate at least one contact when registering an opportunity. If a user fails to do so, an error message will be displayed, prompting them to associate at least one contact.