After S/4HANA Cloud 2005, the "No Change Possible" column is no longer available in the configuration steps under Sales > Basic Functions > Partner Determination in the Manage Your Solution app. This property controls whether the partner specific to a partner function can be changed in customer master, sales documents, deliveries, or billing documents.

However, in OP, you can still set this property via transactions below:

• SSCUI_PD_CUST_MASTER - Set Up Partner Determination for Customer Master
• SSCUI_PD_SLS_DOC_H - Set Up Partner Determination for Sales Document Header
• SSCUI_PD_SD_ITEM - Set Up Partner Determination for Sales Document Item
• SSCUI_PD_DELIVERY - Set Up Partner Determination for Delivery
• SSCUI_PD_BILLING_H - Set Up Partner Determination for Billing Header
• SSCUI_PD_BIL_ITEM - Set Up Partner Determination for Billing Item