HowTo Index Attachment of MSG Files in SharePoint (2010)

In order to be able to index files attached to an msg file uploaded to a SharePoint document library you need to perform a simple modification to your registry.


You need to add this reg in order to tell Crawler how to handle .msg extension.


Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office Server\14.0\Search\Setup\Filters\.msg]
"Extension"="msg"
"FileTypeBucket"=dword:00000001
"MimeTypes"="application/msoutlook"


Copy this in a .reg file and merge this into crawler registry.


Restart OSSearch and perform an IIS reset.
Also be sure that .msg extension in included in crawled extensions (this should be a default).


Then perform a Full Crawl.


The attachment file type indexed are now dependant from iFilters installed on the SharePoint Farm.