On Thursday there were some reports in the Microsoft Advertising Forum that advertisers were complaining they were not able to manage their accounts.

In short, they were banned from using Microsoft’s adCenter product, which places search ads on Bing and Yahoo Search.

The reason they were banned was because their ads and sites were mistakenly labeled as serving up malware.

Ralph David, adCenter Community Team, said this was a mistake and they are working on fixing it. He did not specify how many accounts were effected, but he said:

As of now, I am not sure if it is fixed or not.

Forum discussion at Microsoft Advertising Forum.