Understanding Contract Renewal

To renew or extend a contract, you change the end date on the contract. The contract can have one of these renew types:

Renew Type	Allowed Actions
Renew	You can change the contract end date in the End Date field to a date that is greater than the existing date. The date that you enter must be less than or equal to the renewable end date.
Roll	You can change the contract end date in the End Date field to a date that is greater than the existing date if no renewable end date exists. If a renewable end date exists, the contract end date must be less than or equal to the renewable end date.
Nonrenewable	You can change the contract end date in the End Date field to any date that is greater than the existing date.