Strange calendar behaviour in Outlook

Hi

We recently had our Exchange Server upgraded (from 2003 to 2007) and we are seeing some quite strange behaviour in some people’s calendars.  For example for two staff members who are sharing calendars they are seeing different views of each other’s calendars.

For example (User1 ) Suzanne created a meeting at 10:30 Filesite Training. Then subsequently she decided that (User 2) Branka should attend and updated the meeting. It now appeared in Branka’s diary but as you can see, was deleted from Suzanne’s.

We have seen other strange things like that happening also where somebody received a cancellation request for a meeting but the organiser had not sent it and other attendees did not and attended.

Any ideas?

See attached
 Cal 1 Cal 2
Craig PaulsenSystems EngineerAsked:
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vahiidCommented:
Do you have the latest SP installed for Exchange and Office programs? I remember similar problems were addressed in Exchange 2007 SP3.
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dekkarCommented:
How did you upgrade to 2007? Also are both users on the same server? Is the 2003 server completely gone?
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Craig PaulsenSystems EngineerAuthor Commented:
thank vahiid for the response, Exchange 2007 SP3 is installed, office clients a mixture of office 2003 and 2007 all have the latest service pack installed, again, I need to stress that this was working fine whilst working on Exchange 2003 with the exact same clients?
Any other suggestions?
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RadweldCommented:
Please explain to us the process you used to upgrade! There is no In place upgrade available so you have to install a new server and transition mailboxes. If you didn't do this then it gets interesting.

Are the clients using cache mode? What happens if you perform the same test in owa?
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RadweldCommented:
Please explain to us the process you used to upgrade! There is no In place upgrade available so you have to install a new server and transition mailboxes. If you didn't do this then it gets interesting.

Are the clients using cache mode? What happens if you perform the same test in owa?
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Craig PaulsenSystems EngineerAuthor Commented:
@Radweld, thanks for your response, to answer your question, yes a new server (VM) was provisioned (Windows Server R2 Standard 64bit) with exchange 2007 SP3 and all mailboxes migrated to the new server, all clients are running it's outlook with cached mode turned on,
haven't tested in OWA, what will this prove/indicate?
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dekkarCommented:
Is the old 2003 server still around? on?
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apache09Commented:
Reading over the described issues

You have a few issues here

1 - Sounds like one of the users in question may be syncing their outlook calendar to a mobile device.
If this this is the case, Disbale the Syncing for for.

2 - Delegates, Cheakc that all of these users have delegates.
If they do, mark them down and their permissions and remove all of them.

3 - Exchange Cached Mode - Check that all users with these issues do not have cached exchange mode
Excahnge Cached Mode is defaulted to turn on when a users profile is setup
However, it should not really be on unless the users use a laptop or if there are network connectivity issues

Turn off cached exchange mode.

If you do all of the above, and the symptoms stop
We knows its one of the above issues
You can turn them back on or re-instate the settings one at a time, until you find the reason for the issues
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RadweldCommented:
Do both the users who are experiencing issues use the same version of outlook? If you have a user with outlook 2003 then they are using system public folders for free/busy later versions of outlook use the availability service. If this is the case you might have problems with the public folders.
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Craig PaulsenSystems EngineerAuthor Commented:
both users running with office and outlook 2003 with Service Pack 3 installed, interesting point regarding system public folders being used for free/busy, would moving to the new Exchange server have caused this, keeping in mind nothing at the client level has changed, they now just pointing to the new 2007 exchange box, they were previously on exchange 2003

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RadweldCommented:
If you start outlook from the command prompt with /cleanfreebusy (I think) does this clear things up?

Did you replicate public folders between 2003 and 2007? Did you assign the public folder replica on 2007 to your databases?
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Craig PaulsenSystems EngineerAuthor Commented:
thanks
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apache09Commented:
Why the B Grade?
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