This is very weird and I have not found any question on this on the net.
I am using MS Exchange 2013 and MS Office 2013 Pro 64bit. I am accessing the Exchange from Outlook 2013 and from iPhone and iPad.
I have disabled all Apple Outlook addons.
For about a year or so now, all tasks get within 24 hours of saving this text on their top
" ------------ "
It looks like a separator.
I suspect it may be put in by Apple iPhone Tasks synchronization but am not sure.
Does anybody else experienced this? How to disable this?