Yes, contractors and vendors, who are not part of the organization, can be sent reminder notifications.
A license agreemnents is also contract, but it's based on a software license.
Contract renewals are done under the Renewal tab. All renewed contracts details are displayed under Renewal Details. Note that when parent contract is renewed, the child contract is NOT renewed automatically; it must be renewed separately.
The only relationship possible here is configuring the expired contract as a Child, because only active contracts can be configured as a Parent contract.
Check the other FAQ modules or you can contact our support team at sdp-ondemand-support@manageengine.com