I asked which attribute is more appropriate for that task. You did not answer that nor give any answer on how to replicate what manager/directReport is doing.
Additionally, the original question was if it was possible in Exchange to hide certain accounts so that they would not display as being on a team in Calendar. You side stepped that question and said those accounts shouldn't be there to begin with,
not how an account could be hidden or if that's even possible.
Finally, I have yet to argue with you. I've pointed out that your comments came off rude to me. The doctor analogy did not add value nor represent this issue accurately. If that were a real doctor it would show lack of empathy for the patient
and a lack of interest in getting into the root of the problem. The comment on the AD team making a mistake also did not add value or answer either of the two parts to my question. They know what the manager attribute is for, but at the time chose
to not modify the schema with a custom attribute, or perhaps they too do not know how to replicate the manager/directReport behavior. In any case, pointing out that they're wrong, doesn't answer my question or show HOW to use an extension attribute to
achieve this.
You're an MVP, a partner, and a consultant. You should be familiar with the Code of conduct. Please be considerate and respectful: http://social.technet.microsoft.com/wiki/contents/articles/112.wiki-code-of-conduct.aspx
I'll attempt a more targeted question in the Directory Services forum to see if someone can walk me through the steps to get a extension attribute that will be appropriate for storing service owner type data.