This documentation may be out of date!

This documentation site is for the versions of Synapse maintained by the Foundation (, available under the Apache 2.0 licence.

Since version 1.99, Synapse is now maintained by Element under a new licence (

If you are interested in the documentation for a later version of Synapse, please click here to navigate to this same page on the latest Element Synapse documentation site, if it's available.


Synapse supports authenticating users via the Central Authentication Service protocol (CAS) natively.

Please see the cas_config and sso sections of the configuration manual for more details.