Hi, In short, you can follow the steps below to develop it.
1. Create a new table and List page for "internal Team Status" (Table and Page)
2. Add this field to the Sales Header, Sales Invoice Header and other tables, and use the table relationship attribute to link it. (Table Extension)
3. Display this field on the page you want. (Page Extension)
PS: Depending on the page you display, sometimes you need to call the events in Sales Post Codeunit or others. Otherwise, the value cannot be transferred. (Codeunit)
Hope this helps.
Thanks.
ZHU