Outlook 2013 says the Exchange server is unavailable when you click on the Out of Office button. It connects to an Exchange 2013 server with autodiscover set up. It doesn't change when I increased the size of the ruleset cache nor does it change when I add a SRV record "acbrownit.wordpress.com/2012/12/20/internal-dns-and-exchange-autodiscover/". The internal and external virtual directory addresses are also correct. OWA works but I needed to be able to do this with Outlook.
Any help would be greatly appreciated.