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Bozen999 asked on

Outlook 2010 Duplicate To-Do

I have a problem with my Outlook 2010, which connects to an Exchange Server 2010 (SBS2011):
My to-do list view keeps showing duplicate entries (there is 2 of everything), although it's actually a single entry.
It seems to happen after the first synchronization when the connection is on the local net, when I synch the first time out of office through HTTPS.
outlook.exe /resettodobar and /clenreminders did not have any effect.
Deleting and recreating the profile works sometimes but after a while the problem comes back (and having 4GB of email to carry around re-creating when I'm out of office is not really a good option).

Thanks for any help.

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8/22/2022 - Mon
Sushil Sonawane

Please refer below link this might be help u out.


Also check your account sync with any mobile device this might be cause.

I looked at the article, and can confirm that I tried all possible solutions posted there, save for the "recreate user profile" which might work, for some time, but it's not really an answer.
I only synch with an iPhone and can tell the issue is not there, as the items are not really duplicated, the to-do list shows them twice.
This bug has been around for quite some time, and spans across 3 versions of outlook, and the answer is always: re-create user profile... Not a REAL solution in my opinion.

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After another incident, I finally found a way:
- Close Outlook on the client PC
- use Exchange 2010 panel wizard to give the user Full Access permissions to the mailbox (even though it's the owner of the mailbox)
- Open Outlook and then close it
- remove the Full Access permission on the Exchange Server mailbox
- restart the PC (without the restart it does not work)

It works but I have no idea why, I have not had any problem since.
On the other hand I tried all the solutions I could find in internet without success (and recreating the profile is not much fun when it's 4GB and you're out of office for a month, and in any case the problem comes back as soon as the exchange server becomes 'local', even with a VPN connection).
Experts Exchange has (a) saved my job multiple times, (b) saved me hours, days, and even weeks of work, and often (c) makes me look like a superhero! This place is MAGIC!
Walt Forbes

Problem was on exchange permissions. Solved without recreating the account. Not completely sure...