Cant Add ISP DNS Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Server Operating Systems › Windows Server 2012 / 2012 R2 › Cant Add ISP DNS This topic has 5 replies, 4 voices, and was last updated 6 years, 3 months ago by James Haynes. Viewing 1 post (of 1 total) Author Posts kinalasMember Jun 25, 2014 at 6:08 pm #163910 Greetings! Why can’t I add/Edit my DNS forwarders. Im trying to add my ISP’s DNS. Its says IP address is invalid (can’t resolve). But I dont have a problem with this in Windows 2008 R2. here is my ISP’s DNS – 220.127.116.11 and 18.104.22.168 Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.