The "brandLogoUri" property is not a documented feature of that service. It is included in the response but is not expected to be used. Other than showing up in example responses, you won't see it listed in resource field tables. https://learn.microsoft.com/en-us/bingmaps/rest-services/imagery/imagery-metadata
I've never seen anyone try and use that property before. I believe it is only there for legacy reasons and is not expected to be used. If you really want to use it, do a simple find and replace in your code.