If you want to upgrade or downgrade a contract, go to the contract details of the customer concerned via the Customers tab by clicking the contract ID.
In the contract details press "Perform Action" and select "Up-/Downgrade" in the drop-down menu.
In the Upgrade/Downgrade menu, select the new plan, the planvariant and the change date. If you want the contract to continue running seamlessly without restarting the contract terms and notice periods, activate the option "Inherite Start Date". In addition to the existing components and discounts, you can now add additional components or post discounts and additional invoice items. At the end of the menu you will see the customer's existing contract and the new contract after the upgrade. Click "OK" to complete the upgrade or downgrade.
You can now see the current and future plan variant in the customer's contract details.