Just a quick post for those of you who might have struggled with this error while using Microsoft Dynamics CRM. Judging by the error message, you might think that all you need to do is disable the pop-up blocker in IE or add the server to the exemptions list… you’d be wrong. No matter how much you “loosen” IE’s settings, this just will not go away as long as you have the Google Toolbar for IE plugin enabled. I’ve never encountered this error for any other reason. Uninstall Google Toolbar and this problem will go away instantly. No reboot required (in most cases). You might have to restart Outlook however.