Hallo Markus
standardmäßig indiziert der Suchdienst in Windows 7 nur die lokal abgespeicherten Dateien:
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To keep a current index of all e-mail messages and attachments without excessively taxing the mail server, Windows Search can index Microsoft Office Outlook content in both cached local and online mode but is configured by default not to index online.
If you run in cached local mode with Microsoft Office Outlook 2003 or later, Windows Search indexes the e-mail messages and attachments stored locally on the user’s computer. Outlook receives new e-mail and other information from the Exchange
Server and saves the data in a local mail store file, which Windows Search indexes. This type of indexing eliminates extra load on the Exchange Server and reduces the network bandwidth.
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http://technet.microsoft.com/de-de/library/dd744700(WS.10).aspx#WS_IndexingOutlookandExchange
Gruß
Andrei
