we use a sbs2011 with exchange 2010. Everything worked fine till some days ago. All users are not able to use the "automatic replies" (out of office assistent). It says that the server isn´t there. Outlook still works fine. So i tried to access the webaccess. From the server i can access owa with https://ip/owa
From Internet it works to with https://dyndns/owa
But from every client in LAN (XP and Win7) i get the "The page could not be shown"-message in the browser.
Any ideas ?
Thanks in advance