by roc mehra.
Hi,
Have You used correct salt and Url configure in bigbluebutton.
To get url and salt type bbb-conf --salt in your BBB server. Or you can try bbb-conf --check or restart the bbb server and after that add a new activity BBB and try.
How to make a confrence in BBB with Moodle2.3
Its very simple.There is an icon at the top right on the screen to share the mic
When user enter the virtual class just click on the icon to join the confrence