Item Category "D" services in Purchase Order

Hello,

i have the requirement to manage procurement of planned services with billing plan. In on Premise version I can do it by using item category "D" Services in Purchase Order. In cloud i cannot see this item category (please find the screenshot below with available item categories).

In on premise solution, i would manage this scenario through:

item 10 -> Annual Maintenance fee 1200 € -> Item category "D" Services
Once i enter the item category "D" services, tab "Service" will appears. There i can maintain my fee for each month for example:

Maintenance fee January 100€

Maintenance fee February 100€

...

Maintenance fee January 100€

Do you know why is not available item category "D" services? Do you know how to manage this scenario??

Thanks and regards

Daniele