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Exchagne 2003 to Exchagne 2010 Migration Issues

LAst week i have installed Exchage 2010 SP2 , with coexistance with Exchange 2003.
I have moved around 15 users from Exchagne 2003 to Exchagne 2010.

Now users facing few issue, one issue is very critical.
Outlook 2003 users who are still in Exchagne 2003 SErver not able to open users calender who are moved in to Exchagne 2010 SErvers.
I have reassign the permission , recreate the profile but status is same.
Please advice..

DLeaver

I had the same issue post migration this week, within Outlook I just went to open shared calander and selected the required user again and it automatically reconnected it back up - have you tried this?

am230089

ASKER

Yes, i tryied this also but it is not opening.
it is shwoing i"Unable to display the folder. The information store could not be opened"
Error message.

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DLeaver

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am230089

ASKER

i have 90thousand mailbosex so it is not posible to remove the exchage 2003 right now,
Coexistance phase will comtinure for year

DLeaver

Just check the link to the hotfix I have sent you, this explains why the co-existence causes issues with the calander and the hotfix should resolve the issue for you

am230089

ASKER

So where we have to install this hot fix , Forsnt end server or BAckend servers ?

DLeaver

I would install it on all of your Exch 2003 boxes.

Reading the hotfix I would lean towards the backend servers where the mailboxes are stored, but I think running it on all Exch 2003 servers would be advisable

am230089

ASKER

Thanks for right Approch.