“Display intranet sites in Compatibility View” setting in IE8 is disabled

Question

Regarding browser mode, IE8/9 is supposed to be configured by default to:

1. Render all intranet pages in compatibility mode (falling back to either IE7 "standards mode" or IE5.5 "quirks mode" rendering dependeing on whether or not there is DOCTYPE declared)
2. Automatically identify intranet urls to decide when to fallback

These settings can be configured in:

1. Tools > Compatibility View Settings > "Display intranet sites in Compatibility View" -checkbox
2. Tools > Internet Options > Security -tab > Local intranet > Sites -button. Under popup there are checkboxes to configure the automatic resolution.

In my browser, the "Display intranet sites in Compatibility View" -checkbox is disabled and I cannot turn it on. Why is it disabled and how can I turn it on? By disabled I mean the checkbox is grayed out, so it cannot be enabled.

Answer 1

If this is a work computer it may be set by your company's IT staff via group policies.

"There are approximately 1300 Group Policies for managing Windows® Internet Explorer® 8" including settings for "Turn off Compatibility View", and "Turn on Internet Explorer Standards Mode for Local Intranet".

You could probably determine which registry entry this policy sets, and if you have permission change it on your computer via RegEdit. But, if it is controlled by GP it will get reset the next time the group policy refreshes (about once an hour).