Outlook Out of Office (OOO) Not Working
We’ve all seen the various OOO fixes regarding autodiscover not being correctly configured and resetting the virtual directories in IIS, but what do you do if those are all configured correctly and still Outlook complains that the server is unavailable?
Open regedit and traverse to HKCU\Software\Microsoft\Office\15\Outlook\AutoDiscover
Do you see any exclude entries? Yeah me to – delete them. Reboot. It works.