My dismissed reminders reappear on Monday morning.

[Guest]

Every Monday morning I receive reminders for tasks that I previously have
dismissed. I use Outlook 2000 and our server is Microsoft Exchange Server
2000.

 

[Vince Averello [MVP-Outlook]]

Try starting Outlook once with the /cleanreminders command line switch. This
switch (and a few other really helpful ones) are discussed here:
http://support.microsoft.com/support/kb/articles/q182/1/12.asp