I use OUTLOOK 2016 (OFFICE 365) which ACTIVESYNCs to my OUTLOOK.COM email.
Up until a few weeks ago, when I created a NEW EMAIL in OUTLOOK 2016 and selected FOLLOW-UP, it would appear in my TASK list for me to follow-up. Now, the email loses its FOLLOW-UP flag and does not appear in the TASK list and I need to manually go into the SENT ITEMS folder and flag the email for follow-up.
What could be causing this?