Click on the name of any of the groups that have been created an you should get the option to share the group. You may also want to enable Presence Service and Subscription Plugins for extra functionality. You also need to enable offline messages. The offline Users are automatically placed in the group called Offline Group in spark. This can be changed on each users machine via the contacts menu of spark.
Maybe. Jive folks are very careful about giving the “power” to community users. Inserting of images, creating of documents, bug submitting (not all key contributors can do that either), polls posting and so on. I’m not sure, but i think this status can be achieved by simple points. Contribute - andyou will be awarded
Under User/Groups tab click on Group Summary. A list of your groups should appear. Click on your group andyou should see 2 buttons that say Disable Contact Group sharing and Enable Contact group Sharing. Click on the one for enable and the make sure the All Users button is checked then Save the settings.