New items in all exchange mailboxes cannot be opened

Posted on 2009-02-23
Last Modified: 2012-08-13
We have just recently restored our Exchange server from a backup, and we can access all old email in the system, but any new email received gets a "Cannot open this item, Unknown Error" message.  If we access the mail using OWA, we get a HTTP 500 Error, and if a client tries to access via POP3 or IMAP, this is generated in the event viewer:

Error 0x800ffff occurred while rendering message 001c-00000004d508 for download for user *@*.com

I've run ISINTEG /fix, and used ESEUTIL to check the database consistancy, but still not been able to fix the problem.  All old email can be accessed, but no new emails.

Can anyone help?
Question by:Eboracum
    LVL 32

    Accepted Solution

    Common reasons are AV, try diabling AV on both client and Server
    LVL 15

    Expert Comment

    What method did you use to restore?  Was it just the DB or the entire server?
    LVL 6

    Expert Comment

    Run isinteg atleast thrice till u see 0 warning and errors.
    Still same issue====>Consider moving mailboxes across stores.

    Author Closing Comment

    That was the answer.  I'd actually looked at that link before hand, but did not think it applied to me.  After stopping GFI, and then changing the registry, it worked.  Thanks.
    LVL 32

    Expert Comment

    Glad to help :-)

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