When a new document arrive in Uniconta, it will land in Fysiske bilag and for some also in kassekladden. From there it will be assigned a entydigt ID. This ID is sent to us as documentation, that the document was received.
If the document is processed, it will be moved to Kreditorposteringer and can no longer be seen in Fysiske bilag.
Vendor Entries can be found via Kreditor/Vendor, where you can search on the vendor (in this case BMS) double-click it and from there go to Kreditorposteringer.
If you in Kreditorposteringer click the button Layout, you can choose to add the field Ref til fysiske bilag. This ref refers to the entydige ID which you saw in Fysiske bilag. When this column is activated, you can search on ID and Invoice no.