How can I get access to Business Transactions Monitor (https://bt.basware.com)?

Contact the Basware service desk. If someone at your company already has access to Business Transactions Monitor, they can add access for you as well.

Existing users can use following article to add new BT users - How to Add BT User

What can I use Business Transactions Monitor for?

Business Transactions Monitor allows Basware’s customers and their suppliers to view the status of the invoices they have sent or should receive. When problems occur, the party where the problem is identified will be notified by email.