I've come across a number of cases in the past where Opsmgr/SCE server role installation may fail, or even post installation processes such as report deployment can fail with no indication as to why. Some symptoms you may see which may indicate the need
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Read the complete post at http://blogs.technet.com/cliveeastwood/archive/2008/02/05/server-role-installation-issues-sdk-service-has-not-yet-initialized-or-please-call-managementgroup-reconnect-to-reestablish-the-connection-issues.aspx