Remove duplicates in Outlook
FREE http://www.outlookfreeware.com/en/products/all/OutlookMessagesRemoveDuplicates/ NON FREE http://www.easy2sync.com/en/produkte/1-Click-Duplicate-Delete-Outlook.php
Outlook 2010
How to change default folders language in Exchange 2010 mailbox
From the user`s workstation click Start, click Run, and then type: “Outlook.exe /resetfoldernames”
Cannot open your default e-mail folders. You must connect to microsoft exchange with the current profile before you can synchronize your folders with your outlook data file (.ost)
PROBLEM : Cannot open your default e-mail folders. You must connect to microsoft exchange with the current profile before you can synchronize your folders with your outlook data file (.ost) SOLUTION : The Microsoft Exchange RPC Client Access service was not starting automatically.