ejabberd 21.07 is the last current build, it is time to update, currently it is only 20.03 
Since more one year: A lot of improvements and bug solutions, the more reasons are:
- LDAP/AD improvements: https://github.com/processone/ejabberd/search?o=desc&q=ldap&s=author-date&type=commits
- Roster improvements: https://github.com/processone/ejabberd/search?o=desc&q=roster&s=author-date&type=commits
- STUN/TURN for audio/video calls
- …
Changelog:
Announcements:
- https://www.process-one.net/blog/ejabberd-21-07/
- https://www.process-one.net/blog/ejabberd-21-04/
- https://www.process-one.net/blog/ejabberd-21-01/
- https://www.process-one.net/blog/ejabberd-20-12/
- https://www.process-one.net/blog/ejabberd-20-07/
- https://www.process-one.net/blog/ejabberd-20-04/
- https://www.process-one.net/blog/ejabberd-20-03/
- https://www.process-one.net/blog/ejabberd-20-02/
- https://www.process-one.net/blog/ejabberd-20-01/
18 years of ejabberd:
- https://www.process-one.net/blog/happy-18th-birthday-ejabberd/
- https://www.process-one.net/blog/interview-with-alexey-shchepin-creator-of-ejabberd/
How to set up ejabberd video & voice calling:
Getting started with WebSocket API in ejabberd:
eturnal v1.0.0: say hello to a new STUN/TURN server:
More:
- https://docs.ejabberd.im/admin/configuration/modules/#mod-stun-disco
- https://github.com/processone/ejabberd/blob/master/ejabberd.yml.example
Other articles:
