Follow-up flags don't display reminders...
 

I have a strange one (strange, only because I haven't found the
solution yet): one of my users has implemented Follow-Up flags for
messages in her Inbox but none of them will display the reminders that
she's set. I want to make clear that these messages reside in the
default folder Inbox, so the usual solution of messages not in default
folders does not apply here. Now, she does have a good deal of
reminders already (over 125 of them) but as far as I know Outlook
doesn't have a limit on the number of reminders one can set or Outlook
can display.