Talk about obscure.
One of my end users was greeted by this informative error message recently. He was connecting to the internet using a 3G dongle and then to our network via Cisco AnyConnect VPN. “Software reinstall!” thought I. “Wrong!” said Google.
Although this is probably due to faulty programming on Cisco’s part, the culprit is Internet Explorer. (How I love to blame that historically stinky pile of poodoo.)
To resolve: load up IE. If you can’t see the [ File | Edit | View… ] menus, press Alt, to bring it up. On the File menu, “Work Offline” is almost certainly checked. Uncheck it. Connect again. Job done. Who knew.
If you’re using Internet Explorer 11, bad news: Microsoft removed the “Work offline” option from the File menu. Gone. So there’s no GUI interface to the relevant setting. In fact it’s a registry key called “GlobalUserOffline”, found at
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings. You need to set it to 0, disable “Work offline”. This registry file should do the trick: DisableWorkOffline.reg.