https redirect after login - possibly domain mapping issue

I have been running a multisite program for several years now. I have 40+ sites on one of my installations. Recently, after plugin updates and after my host has a mod security issue, my websites all started redirecting to https after I login. I don't have an https plugin installed and I dont know where that setting could have been made. I checked the .htaccess and the wp-config files and those look normal. Im not sure where else to look..