The field Organizational assignment can be used to assign a contract to a business unit. The field is created by default. The following steps must be performed to create a selection and display the field in the user interface:

Create the term.
Add a field to the content type.

A maximum depth of 3 levels is supported. If you do want a particular layer not to be visible, change the configuration of the term accordingly.

Add a selection for the organizational assignment- This is how it works:

Creating the term - This is how it works

Open the Site settings.
Open the Term Store Management under Site Administration.
In the Term Store Management Tool open the TAXONOMY TERM STORE of the site collection.
Select the term set ecsContractOrganization.
Create a new term by clicking on the term set ecsContractOrganization and selecting Create term
Enter a new name for the term.
Optional: Create a sublevel by clicking on the new term and select Create term.
If the level should not be selectable: On the General tab, uncheck Available for tagging so that the term cannot be selected.
Optional: Assign a default label for additional languages by selecting the appropriate language.
Save the new term.
Delete the site data from the memory of your web browser to directly display the changed configuration.

Adding a field to the content type - This is how it works:

Open the Site settings.
Open Site content types under Web Designer Galleries.
Open the site content type ecsContractContentType.
Select Add from existing site columns and add the column Organizational assignment.
Delete the site data from the memory of your web browser to directly display the changed configuration.

Including additional lists

Configuring d.velop contracts for Microsoft 365 in the configuration interface