Vanguard Search will end support for Internet Explorer (all versions) effective 3/1/2020. Microsoft recently released a new version of their Edge browser based upon Chromium – an industry standard model with improved image resolution which has been the Vanguard standard since its inception. We encourage you to switch to the newest version of Microsoft Edge or Google Chrome as soon as possible.
Here's more. https://www.microsoft.com/en-us/edge