SAML Readme

   KB 20404        Last updated on 2015-07-11  

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Included in Network Edition at the following location:


The Zimbra SAML extension provides support for the "Browser/POST Profile of SAML" - Section 4.1.2 of Zimbra is the "Destination
Site" in the context of this section of the spec.

The flow for a user on a browser would be:

1. User authenticates with an IdP which can act as a SAML Provider.
2. The IdP redirects the browser to Zimbra SAML extension URL (<zimbra_base_url>/service/extension/samlreceiver) and
   passes along a SAML Response (containing a SAML Assertion).
3. The SAML extension checks the validity of the SAML Response, and then looks up the Subject inside the SAML assertion
   which should be the email address corresponding to user's Zimbra account.
4. Finally, a Zimbra cookie corresponding to that Zimbra account is returned to the browser and is redirected to the
   default Zimbra mail URL.

Zimbra Setup

- Create "saml" directory under /opt/zimbra/lib/ext; Copy samlextn.jar under it.

- Add the SAML signing certificate to the domain:

    zmprov md <domain> zimbraMyoneloginSamlSigningCert <saml-signing-cert-base64-data>

Note for SAML Provider

SAML Provider must POST the SAML Response at the following URL for SSO:


This SAML Consumer extension requires that the Subject Name Identifier inside the SAML Assertion must be the account
email address, so configure the Provider accordingly.

Verified Against: Zimbra Collaboration 8.0, 7.0 Date Created: 04/16/2014
Article ID: Date Modified: 2015-07-11

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