Videoconferencing with BigBlueButton

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With BigBlueButton the Computing Centre provides an audio and video conference system for team meetings and online teaching.


BigBlueButton was developed as an open source web conference system for use in e-learning. It can be used for audio and video conferences and has an integrated function for open and private chats, a shared whiteboard, an online survey tool and the possibility to share presentations, videos or screens. The possible duration of a conference or presentation is currently limited to 4 hours. If a session is longer than 30 minutes without active participation / participants, it is ended.

Current notice

The permission to record conferences has been granted by the University Board. In this context, please note the legal framework:

Notes on using the recording function for video conferences

Sample declaration of consent for video conference recording


The system can be found at and is accessible worldwide without VPN. To register, you only need a valid RZ-account (e.g. for VPN access or using the Ricoh printers) with the associated account password. No separate service booking is necessary. The best results can currently be achieved with  Firefox, Edge or Chrome.


Service of the University Computing Centre, no special license needed.
All data stay on university servers, no VPN required, worldwide invitation to further participants via link is possible.


Normally this service can be used around the clock.

Tips & Tricks

Share you own vidoes in BBB via CAU-Cloud


- active CAU-Cloud Account (
- uploaded the video into the cloud
- shared this video (public link, e.g.

Share the video in a BBB session:
- open the action menu  (+) and choose "Share an external video"
- Copy the CAU-Cloud share link and add: /download?.mp4 at the  end:
- available formats are .mp4 and .m4v (adjust the link accordingly)

Service hours

Error messages are accepted around the clock via


In case of any problems or questions, please contact us via  hotline form, mail or phone (Monday to Friday from 9am to 4pm) under 880-5555.