ADMIN PRIVILEGES REQUIRED

This documentation is for Stack Overflow Enterprise. Free, Basic, and Business users can access their documentation here. Find your plan.

Overview

Follow these instructions to configure SAML authentication for your Stack Overflow for Teams Enterprise (SOE) site.

Create a new Okta SAML application

From the Applications page in Okta, click Create App Integration. Add a new custom Application.
Choose SAML 2.0 as Sign-on method.
For General Settings choose any App name and App logo (optional) that makes sense for your organization.

Configure Okta SAML settings

In a new browser window or tab, open your SOE site and click Admin settings in the left-hand menu. Click Authentication, then Configure SAML 2.0.
Return to the SAML Settings for Okta and add the following information.
- Single sign-on URL This is the /auth/saml2/post URL of your SOE instance. This is also your Assertion consumer service URL on SOE.
- Audience URI This is something you can make up. On the SOE authentication settings, this will be used as the Audience Restriction. A good suggestion is to use the sample URL provided on the SOE athentication settings page.
- Default Relay State Leave this blank.
- Name ID Format Choose Unspecified.
- Application Username Use a value that will be static for users. Okta username will work.
Click Show Advanced Settings and check the following settings.
- Set Response to Signed. Stack Overflow Enterprise will not accept unsigned responses.
- Leave Assertion Encryption as Unencrypted.
Encrypt assertions (optional)
You can also encrypt the assertion if desired. In that case, you need to upload the public key of your signing certificate to Okta. Your SOE instance also needs both the private and public keys, and how you'll provide those depends on your deployment type.
- For on-premise deployments, you need to provide the certificate into the Windows Certificate Store at Local Machine -> Personal. You must do this on all web servers running SOE.
- For cloud-hosted deployments, reach out to Stack Overflow support with your certificates and we'll upload them to your SOE site.
Set attribute statements.

Minimum requirements for SAML Assertion:
- Email Address
- Display Name
- Unique user identifier This should never change for a user (e.g., Okta offers an "employee number" field, but you need to populate this for every user—it cannot be empty).
Finish Okta setup.
- Select I'm an Okta customer adding an internal app.
- For App type, check This is an internal app that we have created.

Configure SOE SAML settings

After you save the application, click the Sign On tab.
Click View Setup Instructions and open the link in a new browser window or tab. This page shows setup and configuration documentation, as well as the URLs you'll need to continue the setup.
Add the following values to your SOE authentication settings.
- Identity Provider Single Sign-On URL Copy this value to the SOE Single Sign-On Service URL field.
- Identity Provider Issuer Copy this value to the SOE Issuer field.
- Audience Restriction Enter the example value provided on SOE authentication settings.
- User Identifier Assertion The value used on Okta for this (for example: login, UID, etc.).
- Display Name Assertion Set to displayName.
- Email Address Assertion Set to email.
- X.509 Certificate Copy this value to the SOE Identity Provider Certificate field.
Set Use Subject/NameID as User Identifier field.

Use Subject/NameID as user identifier is checked by default, which allows the IdP to specify the user identifier based on your SAML app configuration. This is the recommended setting.

If you uncheck this option, you can manually specify a User identifier assertion of your choice. Be sure to choose a user identifier that will never change (for example: login or user ID). Email address is not a good choice for user identifier, as email addresses can change.
Validate your certificate by clicking Validate Certificate. You should see a green box with a success message. If you don't, make sure you copied and pasted the full text of the certificate.

Test and save your SAML configuration

To complete the SSO setup, click Save Settings.

When saving settings, SOE will first perform an authentication test. If the test succeeds, SOE will apply your new authentication settings. Logged-in users stay logged in, as all active user sessions remain valid.

If the test fails, SOE will not apply the authentication settings. You'll stay on the SAML settings page so you can troubleshoot and correct problems.

This test acts as a safety net to keep invalid authentication settings from locking users (yourself included) out of your site. If you do find your users locked out of your site, reach out to Stack Overflow product support for help.

You can also click Test currently saved SAML configuration to display technical details about your SAML authentication. You'll find these helpful for understanding what information your IdP and SOE exchange. This is also useful when troubleshooting.

If you can't resolve the authentication errors, reach out to Stack Overflow support for help.