Exchange 2000 "not enough memory" event ID 12800

We have Exchange 2000 running on Windows 2000, service pack 4, and Office 2003.

When one user (and it seems only one user) uses Outlook in "Cached Exchange Mode" he is unable to sync correctly, and the following messages are recorded.
I've used several client machines, with different profiles, but the problem always occurs; so I think it's a problem with the server.
Before someone points out that the server is running low on memory, it has 1GB and has plenty unallocated.

This is recorded in the server's event log
Event Type:     Error
Event Source:     MSExchangeIS
Event Category:     Content Engine
Event ID:     12800
Date:          xx/xx/xxxx
Time:          xx:xx:xx PM
User:          N/A
Computer:    xxxx
Message processing failed because there is not enough available memory (8007000E-82000387).

In the user's "sync issues" folder, the following is recorded:
13:37:39 Synchronizer Version 11.0.6555
13:37:39 Synchronizing Mailbox 'Dxxxx Cxxxxxxxxx'
13:38:04 Synchronizing server changes in folder 'Deleted Items'
13:38:04 Downloading from server 'xxxxxxxx.CCLE.CO.UK'
13:38:59 Terminated in error
13:38:59 [8007000E-50C-8007000E-560]
13:38:59 There is not enough memory available to perform the operation.
13:38:59 Microsoft Exchange Server Information Store
13:38:59 For more information on this failure, click the URL below:

I've tried the usual google answers, any bright ideas?
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Do you see Event ID- 9582 also in your Application log? If yes, its Virtual Memory Fragmentation issue, check the KB - 325044 for more help.
Is this happening only when this particular user try to sync with Exchange server?
Also match the file versions given in this article with the file versions on your exchange box. This hotfix might solve your problem.

Amit Aggarwal.

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p_reahAuthor Commented:
There are no 9582 messages.

It is indeed (so far as we can tell) one user, and only when trying to sync.

MS are sending me the hotfix. If that doesn't work I'll work my way through the KB's.

Thanks for the help chaps,

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