Sometimes(often) I get this Exception InvalidOperationException: Presence manifest has not been supplied. when I call UserEndpoint.LocalOwnerPresence.BeginPublishPresence().
Microsoft documentation says: If an application attempts to publish an unrecognized category using the BeginPublishPresence method, an InvalidOperationException is thrown.
The point is that if that were the case then I should always get the exception, I don't understand why I get this exception and what I should do about it..
Ulf