Whenever i try to access the mailbox data using Outlook 2003 it gives the following error message

342240 pts.
Tags:
Domain Controller
Exchange 2007
Outlook
Outlook 2003
Outlook error messages
A question submitted on SearchExchange.com We have a Exchange Server 2007 installed on the DC machine. On the another machine, we have Outlook 2003 installed. Whenever i try to access the mailbox data using the Outlook it gives the following error message: "Unable to open your default e-mail folders. The file c:.....outlook1.ost cannot be accessed. You must connect to your Microsoft Exchange Server computer at least once before you can use your offline folder file." Not able to figure out what could be the exact root cause of it. Being a Developer, and not having expertise in the Exchange Server 2007.

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Try doing a dearch on the outlook 2003 machine for any .ost files and delete them. You have to search in hidden folders so make sure you enable the ability to view hidden folders first.
If you still get the error, go into the mail profile via the mail icon in the control panel and turn off cached mode. Try connecting again without cached mode and see if that will work. If it does, try turning cached mode back on and restarting outlook. That is, if you want to use the cached mode.

Discuss This Question: 3  Replies

 
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  • Technochic
    Also if you delete the .ost file and put outlook back on cached mode after the delete, Outlook will create a new .ost file. Close outlook before trying to delete the existing .ost.
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  • Jlogart
    This error indicates that your OST file gets orphaned. As OST is only the cached copy of exchange server mailbox, you can delete it, and it will be recreated when you next time connect with Exchange Server. If you have some non-synchronize data oin teh OST file you need to convert OST to PST file to recover the components.
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  • rabbanisap
    Apart from the 2 replies pls recheck thr permissions on the mailboc and permissions on the drive where ost fle is reside
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