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Exchange 2007 store size significantly smaller than the psts imported, some mail not in web access

We just migrated one of our clients from Merak to Exchange 2007. Most of our users are using Outlook 2003 with a few on 2007. What we did is setup a new profile in Outlook, setup most users to connect to the Exchange server via TCP/IP, with a few connecting RPC over HTTP. We then imported, in the new Exchange mailbox on the workstation, each users pst files. The problem is the store on the Exchange Server appears significantly smaller than the pst files we imported, and when we check a few users mailboxes on Outlook Web Access they are missing some emails. Any idea why this is happening or settings we can check? On a side note, the Exchange server is located in separate AD site and is located offsite. The connection speed to the server site should be fast enough.
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AllCounty
Asked:
AllCounty
1 Solution
 
madhuskCommented:
It seems that during the migration you must have selected the option skip corrupted messages due to which some of the emails are missing.

Regards,
Madhu
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Andrej PirmanCommented:
Check on workstations under Properties of User's Mailbox, if Outlook is working in Cached mode, and if Mail store is "User's Mailbox" and NOT Outlook pst file.
Sometimes Outlook selects to store mail localy instead to Exchange, so mail is not synchronised.
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AllCountyAuthor Commented:
On all profiles we right clicked on the outlook taskbar icon and selected download full items, and hit send/receive and waited a few hours for all over the information to fully download, we compared the .ost to the size of the exchange store which was easy to check in outlook web access by hovering over the profile name. Additionally on RPC over HTTP we unchecked "on fast networks connect using http first then connect using tcp ip"
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