I'm using SEP v12.1.671.4971 and have been for the past 3 years without any problems.
A couple of weeks ago, I upgraded from Internet Explorer 9 to Internet Explorer 11 using Windows Update. I then logged into all my usual websites, ticking the "remember me" checkbox so that session cookies would be created.
I started using IE11 and found it was working well, until after about 24 hours when I discovered I had been logged out of all my websites - every single one.
I then moved into investigation and test mode, to try to figure out the cause. After a few days, I worked out that it was the SEP Active Scan.
My session cookies work perfectly before the Active Scan - I've tested them right up until the last minute before the Scheduled Active Scan starts - but immediately after the Active Scan has finished I am no longer logged in to any of my websites. I've been able to repeat this several times now. I've also tested disabling the Scheduled Active Scan with the result that my session cookies continue to work for days.
I don't know, specifically, what the Active Scan is doing to cause this behaviour, but I suspect it may have something to do with the new way that IE10 and IE11 store and manage their cache (including cookies) - see this link, this link and this link.
It's driving me crazy because at the moment I'm having to re-log in to every single one of my websites every 24 hours.
Has anyone else come across this problem? Does anyone have a solution?
Thanks all.