How to redirect internet explorer users?

You can achieve this by using the Meta Info Question and either display logic or survey flow.

You need to make sure that the Meta Info Question is on a page everyone will see. I would recommend the set up:

* Block 1 - Intro
Q1 is descriptive text that introduces the survey
Q2 is the meta info question

* Next element in the Survey Flow is a branch with the condition
Q2 Browser Meta Info Browser Is Equal to MSIE
Under the branch add an End of Survey Element and customize to redirect to the URL that you want IE users going to

* Remaining elements in your Survey Flow


If you just want to display a message you can use display logic with the same conditions as the branch in the survey flow to display a descriptive text question with your warning to Internet Explorer users.