From: Wayne RESA
Date: Fri, Sep 25, 2015 at 9:15 AM
Subject: 6pm brief maintenance today

Today at 6pm we will be upgrading our SSL certificate for SIS web applications to the SHA-2 encryption.  This is just a swap from one certificate to another and only takes a couple of minutes.  It will require a reload of the browser for anyone in any of the SIS web-based applications at the moment of swapping certs.  This is required to be done before 9/30/15 for Paypal transfers.
Here is some info about browser support for the TLS 1.2 and SHA-2.
Browser support was implemented in Aug 2011 for IE9 and Opera 10.