Being one of the people who had experienced similar problems
(without any filter being applied - at least not visibly), here's
an update of my latest interactions with our IT support:

After several sessions with the usual /cleanfreebusy, /resetfolders,
/cleanviews etc, creating a new profile in cached and non-cached
mode, which all did not correct the problem, but at least went
deeper and deeper (or rather higher up the 'expert escalation'),
I finally was connected to an expert who had a very clear idea what
caused the problem: He assumed that my views.dat was corrupted,
so wanted to delete it and have outlook recreate it.
Bad luck, though - the only views.dat on my computer is the mailViews.dat
from Thunderbird. That completely threw him off track, so he
closed the netmeeting and the phone call and went home for
further investigations, mumbling something about 'possibly have to
repair or re-install', and he wasn't heard of for some hours.

Next time he called he searched for views.dat again and still
couldn't find it.

Then he didn't call back. That was on Friday.

Today I got a mail stating my case (which apparently was one
of many similar cases) was closed as resolved.
According to the infomrmation in the mail the problem had been
caused by a change in the service account on the exchange server
from NT4 to Active Directory.
Now don't ask me what this means, and why it shoudl cause such
an obscure problem - what I know is that my hidden appointment was
still hidden, so I deleted and re-created it.
Now it's visible also in the day view; let's see how long it will
take until it disappears again ;-)


What I don't understand, though: where - if not in views.dat - are
my views stored? I have created new views, and they are surviving
outlook sessions ...
(And yes, I'm also looking for hidden files;-)

///Walter





Sue Mosher [MVP-Outlook] wrote:
That's certainly where I'd be looking -- at the Filter for the problem view.


"David French" wrote in message
...

Sue,
Yes, these are all recurring appointments.
So from what you are suggesting there may have been 'adjustments'
in the view parameters that appear to be excluding certain events,
am I on the right track?

Dave