You can use this policy module plugin to modify the SMimeCapabilities extension of a certificate. SMime algorithms and their ...

You can use this policy module plugin to modify the SMimeCapabilities extension of
a certificate.
SMime algorithms and their parameters can be input in the space below.

Algorithms are identified by their OID.  Parameters are identified by the hex value 
of any ASN.1 object within square brackets.  Multiple algorithms and parameters 
are separated by a semi-colon.

Example:
English
English (United States)
Deutsch (Deutschland)
German (Germany)
Español (España)
Spanish (Spain)
Français (France)
French (France)
italiano
Italian
日本語
Japanese