I have one user, using Windows 7 professional, accessing an Exchange 2010 standard server, getting the "Your out of Office settings cannot be displayed, because the server is currently unavailable, Try again later." error.
I have walked through the steps in your page of "out of office assistance error" advice including all the steps in the link :http://www.proexchange.be/blogs/exchange2007/archive/2009/07/14/your-out-of-office-settings-cannot-be-displayed-because-the-server-is-currently-unavailable-try-again-later.aspx
I can log in on another Windows 7 workstation as this user and do not have the problem. I can also access his account via owa, and have the ability to set out of office.
I have created a new profile on his workstation which did not help.
I have used the flushdns.
I am running out of ideas, any help would be appreciated.
Rhonda Siner