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Messages Being Removed From Exchange Server Mailbox Whilst Synching Exchange Mailbox in Cached Mode

I have configured one of my users laptops to synchronize his Exchange Server mailbox using Outlook Anywhere from his version of Outlook 2003 in cached mode. He is in the process of performing the first synchronization over a fairly slow DSL connection and all his messages are being download to his local mailbox on his laptop.

During the synchronization he connected to his mailbox using Outlook Web Access and noticed that some of the messages he would expect to see in his Inbox were no longer visible. From the Exchange server I can see that the number of messages in his server mailbox are reducing as they are being downloaded to his laptop computer.

I am extremly puzzled and concerned by this behaviour. Has anyone else experienced this before and if so how did you recover?

Thanks in advance,

Steve Cage
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StevenCage
Asked:
StevenCage
2 Solutions
 
peakpeakCommented:
The messages that dissapeared in OWA, are they visible in Outlook?
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StevenCageAuthor Commented:
I have resolved the problem.

When I created the new Cached Exchange connection in Microsoft Outlook 2003 a new outlook.ost file was created but there was an existing outlook.pst file and the messages were downloaded into this file. I presume there is an incompatibility between Exchange Cached Mode and .PST files that does not fully support cached mode.

To resolve the problem:
Exported the contents of Outlook.pst to a backup file.
Removed the existing Outlook mail profile from Control Panel | Mail
From Windows Explorer enamed the Outlook folder.
Created a new Outlook Mail Profile from Control Panel | Mail.
Configured a new cached connection to the Exchange server.
Imported the missing messages from the backup of the .PST file.
Outlook pushed the missing messsages back to the Exchange server.
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