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From: PicoMight on 15 May 2010 01:09
64bit Outlook Hotmail Connector installed for 64bit Outlook 2010 cannot
create a correct .ost file.
I have tried removing the hotmail MAPI account and reinstalling it but
nothing fixes this problem.

"Cannot expand the folder. The set of folders cannot be opened. The file
C:\Users\Cassie\AppData\Local\Microsoft\Outlook\rebel_puddy_tat_hotmail0.ost
is not an Outlook data file (.ost)"

Thanks in advance!
From: Brian Tillman [MVP-Outlook] on 17 May 2010 09:12
"PicoMight" <PicoMight(a)discussions.microsoft.com> wrote in message
news:DF92B8E9-FB40-4CA3-9D9B-8B719A0EF8E5(a)microsoft.com...

> 64bit Outlook Hotmail Connector installed for 64bit Outlook 2010 cannot
> create a correct .ost file.
> I have tried removing the hotmail MAPI account and reinstalling it but
> nothing fixes this problem.
>
> "Cannot expand the folder. The set of folders cannot be opened. The file
> C:\Users\Cassie\AppData\Local\Microsoft\Outlook\rebel_puddy_tat_hotmail0.ost
> is not an Outlook data file (.ost)"

Delete the Hotmail account. Close Outlook. Uninstall the Outlook Hotmail
Connector. Delete the OST. Now reinstall the Outlook Hotmail Connector.
Readd the account. Outlook should create a new OST.
--
Brian Tillman [MVP-Outlook]

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