We recently migrated a client with a large terminal server cluster from Exchange 2007 to Exchange 2013. Immediately users began to report issues with their search results returning only a very small amount of items. We have yet to be able to find a resolution to this through standard operations of rebuilding the indexes.
What I did find online was an article talking about a 250 item result limit that is some how hard coded into Exchange 2013 when your Outlook is in online mode. Is this true? Is there a work around or fix?