If you are an existing Subscribe and Amend customer, and want to leverage Orders, Orders Harmonization helps you to transition to Orders easily. 

The tenant type can be identified directly from the tabs listed under the Customers tab.

Orders	Subscribe and Amend	Orders Harmonization

The guide lists articles as references for migrating from Subscribe and Amend tenant to Orders tenant.

You can access major functions of Subscribe and Amend tenant and Orders tenant in your Orders Harmonization tenant. For configurations in Subscribe and Amend tenant and Orders tenant, see Subscribe and Amend and Orders, respectively.