passthroughInboundSMIME doesn't work

Hi @all

in Outlook the native SMIME support doesn't work when PGP is running. If PGP Desktop is closed, all E-Mails are shwon as SMINE signed / encrypted.

As far as I know, in the pref.xml the value "passthroughInboundSMIME" should be changed to "true". But that doesn't solve the problem:-(

I use MS Outlook 2013 and PGP 10.2.1.

Does anyone know a solution for that? Thanks!