MSMQ Setup copies the IE certification authority configuration. Thereafter, the IE certification authority configuration and the MSMQ certification authority configuration are maintained separately, with one exception: When you run Control Panel, double-click MS Message Queue, click the Security tab, and then click the Certification Authorities button, any certification authorities added or removed from the IE certification authority configuration are added to, or removed from, the MSMQ certification authority configuration. However, the settings of the two certification authority configurations (which certification authorities are trusted by IE, and which certification authorities are trusted by MSMQ) are always maintained separately.
By default, the IE certification authority configuration trusts over a dozen certification authorities. If users don't change these settings, each MSMQ client and MSMQ routing server will trust the same certification authorities.
MSMQ client Setup automatically enables secure MQIS access if Setup can establish secure communication with an MQIS server. Each client can enable or disable secure MQIS access using the MS Message Queue icon in Control Panel.
For complete instructions on configuring MSMQ clients and MSMQ routing servers for secure MQIS access, see "Securing Controller Server Communications" in Chapter 3, "Managing MSMQ."