IRM-protected messages cannot be returned in search results for Exchange 2013

In KB http://support.microsoft.com/kb/2707146 we describe a problem with IRM-protected messages, which were journaled and  forwarded to an external contact for Exchange 2010. In that Knowledge Base Article we stated, that we fixed the problem in  Update Rollup 5 version 2 for Exchange Server 2010 Service Pack 2. Unfortunately this fix  was not carried over into Exchange…