Microsoft Monetize - Working with third-party inventory
Third-party inventory is defined as any inventory that does not originate from your own network. This includes inventory resold by other networks on the platform as well as by external entities like exchanges and SSPs. This section of the documentation contains reference material and instructions for researching and discovering third-party inventory on the Microsoft Advertising platform.
Related topics
You can report on third-party inventory through the Universal Content Categories Report.