This ticket regroups two issues: The global plugin settings that were previously allowing admin user to disable meeting features globally (mic, cam, layout...) have not been ported from 2.4 A bigbluebutton activity did not send the right payload to the BBB server, resulting in features not being disabled as expected It is important to note that it is better to start from a fresh install as if not, default values for the settings might not be set (we have not updated the version.php so update will not be run at all for the plugin). Part 1: Plugin settings for an already created activity Create a new course C1 and a new Activity BigblueButton B1 Go to Site Administration > Plugins > Activity modules > BigBlueButton > Configuration for locking settings Uncheck "Disable webcam can be edited" (*1) Save changes Go to activity B1 and edit the settings Confirm that you don't see "Disable webcams" in the "Lock settings" section Part 2: Plugin settings for a new activity Go to Site Administration > Plugins > Activity modules > BigBlueButton > Configuration for locking settings Check "Disable webcam can be edited" (*1) Check "Disable webcam enabled by default" (*1) Save changes In course C1, create a new BBB activity Confirm "Disable webcams" is checked in the "Lock settings" section Go to Site Administration > Plugins > Activity modules > BigBlueButton > Configuration for locking settings Uncheck "Disable webcam enabled by default" (*1) Save changes In course C1, create a new BBB activity Confirm "Disable webcams" is not be checked in the "Lock settings" section Part 3: Join meeting and disabled features Create a user t1 and enrol as a teacher in course C1 Create a user s1 and enrol as a student in course C1 Login as t1 Create a new BBB Activity called Instance 1  In the activity creation form, check "Disable microphones" (*1) in the "Lock settings" section Save and display Join the meeting Confirm you have access to your microphone Login as s1 Join the meeting Confirm you don't have access to your microphone   (*1) The test can be repeated with the following settings: Disable webcams (no access to the webcam) Disable private chat (no access to private chat between users) Disable public chat (no public chat) Disable shared notes (no shared notes) Lock room layout (cannot change the layout) Userlist Part 4: Lock settings are visible / invisible Add the following to your config.php: $CFG->bigbluebuttonbn = [ 'disablecam_default' => true , 'disablemic_default' => true , 'disableprivatechat_default' => true , 'disablepublicchat_default' => true , 'disablenote_default' => true , 'hideuserlist_default' => true , 'lockonjoin_default' => true , 'disablecam_editable' => true , 'disablemic_editable' => true , 'disableprivatechat_editable' => true , 'disablepublicchat_editable' => true , 'disablenote_editable' => true , 'hideuserlist_editable' => true , 'lockonjoin_editable' => true , ]; Then: Go to Site Administration > Plugins > Activity modules > BigBlueButton Confirm Configuration for locking settings is not present