This Operation has been canceled due to restrictions in effect on this computer. Please contact your system administrator.

The Outlook Error “This Operation has been canceled due to restrictions in effect on this computer. Please contact your system administrator." seen when trying to open a link within an email can be resolved by doing the following

1.Close Outlook.
2.Open Internet explorer go to Tools > Internet Options > Programs Tab > Click Make Default to set IE as the default browser
3.Then from with in Internet Options go to the Advanced Tab then Click Restore Advanced Settings.
4. Test to see if the issue is resolved.

If the above does not resolve the issue run the following from a command Prompt to update a registry value setting it back to the default value.

reg add HKCR\.html\ /d htmlfile /f