Thank you for the reply. Yes, Bing is Mircrosoft's search engine. Recently, Microsoft rebranded so the link is to Microsoft Ads now and not Bing.
The questions in the link sent are not useful to me, I'm not sure if the problem is clearly understood. We are unable to sign into the Microsoft Ads account from the set up process within Adobe Analytics.
We can sign into Microsoft Ads directly and we can sign into Adobe Analytics.
The correct permissions in both Mircrosoft Ads and Adobe Analytics have been set up.
I hope this makes it more clear what the issue is.
Thank you!