You can use ABN Validator to identify between Active and Cancelled ABNs in Dynamics 365 Business Central.
Validating individual ABNs
Validation is performed automatically on the ABN field of the Vendor and Customer card. After entering the ABN, a search will be carried out to retrieve information such as the Main Name, Trading Name, and ABN Status.
If the ABN Status is Active, the Registered field will be switched on.
Validating all ABNs for Customers and Vendors
ABN Validator provides two worksheets for verifying the ABNs of all customers or vendors simultaneously.