For earlier versions of Outlook I use solution described in this answer https://stackoverflow.com/a/2716229/1741116 , and it works fine for me.
But in Outlook 2013 intercommunication with Windows Search has been removed (http://blogs.office.com/b/microsoft-outlook/archive/2012/12/19/outlook-2013-deprecated-features-and-components.aspx), and even Outlook item in Indexing Options is not expandable anymore.
Modifying the value in registry key ('20' at the end is actually only for my machine)
HKLM\SOFTWARE\Microsoft\Windows Search\CrawlScopeManager\Windows\SystemIndex\WorkingSetRules\20
from
mapi15://{S-1-5-21-1397509461-1896107085-1961542790-1001}/
to
mapi://{S-1-5-21-1397509461-1896107085-1961542790-1001}/
adds expandable Outlook item
and I can exclude locations from indexing by WDS (programmatically or by hand), but still not able to prevent my specific storage from indexing by Outlook 2013. Can anyone suggest me an answer or a link to resource with explanation of my problem?