We use Exchange Web Access. When the reminder window in Web Outlook comes we
are unable to open the "reminder" either by double clicking or selecting
"open". The hour glass come up for about 1 second then nothing else opens.
Thanks- -that's clear. I think it is unlikely that this is Windows
Defender related, and likely that it is related to some specific critical
security patch. Do you have a clear picture of just when this behavior
change started?