McAfee announces the End of Life (EOL) for McAfee Network Security Platform 8.1 effective March 31, 2020.
McAfee recommends upgrading to version 9.1 or later to benefit from the latest software developments, and to avoid interruption of product support.

See KB90171 for details (https://kc.mcafee.com/corporate/index?page=content&id=KB90171)

The EOL product list and policy is available at: http://mcafee.com/us/support/support-eol.aspx.