Using the same AP hub can be great for generating Invoice Payable Files from one location for multiple properties. One of the limitations however is that when adding new Suppliers, you will be adding the Supplier(s) to all properties using the AP hub.

When you add a new Supplier, it will either add or import them and create unique Trade Relationships for each property. These can be viewed in the 'My Suppliers' area and this then becomes a unique area for managing the Supplier within each property. Changing the Supplier Number / Vendor Code for a Supplier within the property's 'My Supplier' area will not affect the other properties.

Since Formal Suppliers manage some of their own details such as the ABN, then you may be limited to what you can edit. Using Officeworks as an example of an Informal Supplier, you would have better control over how to manage this Supplier. Let's say you import Officeworks into your AP hub, you can then set unique values between each of the properties and the Supplier i.e. the Supplier Number / Vendor Code (so that a different bank account is used upon payment) and Business Numbers if different (possibly due to different branches). You can even disable or delete the Supplier from the properties if needed.

Alternatively, if you have a large amount of properties to manage and it is too difficult to go into each one after importing, you may want to import Officeworks with placeholder information i.e. '0' for Business Number and '0' for Supplier Number / Vendor Code. Once imported, you can go into the select few properties that need to use the Supplier and update the Business Number and Supplier Number.