Coupa cloud application

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Using Security Assertion Markup Language (SAML), your users can use their Google Cloud credentials to sign in to enterprise-cloud applications.

Set up SSO via SAML for Coupa

Here's how to set up single sign-on (SSO) via SAML for the Coupa® application.

Step 1: Set up Coupa as a SAML 2.0 service provider (SP)
  1. Sign in to your Google Admin console.

    Sign in using your administrator account (does not end in @gmail.com).

  2. From the Admin console Home page, go to Security, and then the SSO settings:

    You must be signed in as a super administrator for this task.

    Click Set up single sign-on (SSO) for SAML applications.

    Or, if you don’t have that option:

    Click Set up single sign-on (SSO).

  3. Click the Download button to download the SSO URL, the Entity ID (Issuer ID), the Google IdP metadata and the X.509 Certificate.
  4. In a new browser tab, log into your Coupa application as an administrator.
  5. Go to https://<coupa instance>/administration/security.
  6. Check the Log in using SAML checkbox.
  7. Upload the Google IdP metadata and the X.509 Certificate required for SSO setup you downloaded in Step 3.
  8. Click Save and proceed to the next section to set up Google as a SAML identity provider (IdP).
Step 2: Set up Google as a SAML identity provider (IdP)
  1. In a new browser tab, 
    Sign in to your Google Admin console.

    Sign in using your administrator account (does not end in @gmail.com).

  2. From the Admin console Home page, go to Apps and then SAML apps.

    To see Apps on the Home page, you might have to click More controls at the bottom. 

  3. Click the plus (+) icon in the bottom corner.
  4. Select the Coupa item from the list. The values on the Google IDP Information page automatically populate.
  5. There are two ways to collect the service provider Setup information: you can copy the Entity ID and the Single Sign-On URL field values and download the X.509 Certificate, paste them into the appropriate service provider Setup fields, and then click Next, or you can download the IDP metadata, upload it into the appropriate service provider Setup fields, and then  come back to the admin console and click Next.
  6. In the Basic application information window, the Application name and Description values automatically populate.
  7. Click Next.
Step 3: Enter service provider details in Google Admin console
  1. In the Service Provider Details section, enter the following URLs into the Entity IDACS URL, and Start URL fields:
            ACS URL: https://prdsso35.coupahost.com/sp/ACS.saml2
            Entity ID: prdsso35.coupahost.com
            Start URL: coupa instance URL
  2. Leave Signed Response unchecked.
    When the Signed Response checkbox is unchecked, only the assertion is signed. When the Signed Response checkbox is checked, the entire response is signed.
  3. The default Name ID is the primary email. Multi-value input is not supported.
  4. Click Next.
  5. Click Add new mapping and map the attribute value "Mailpath" to Basic Information > Primary Email
  6. In the drop-down list, select the Category and User attribute to map the attribute from the Google profile.
  7. Click Finish.
Step 4: Enable the Coupa app
  1. Sign in to your Google Admin console.

    Sign in using your administrator account (does not end in @gmail.com).

  2. From the Admin console Home page, go to Apps and then SAML apps.

    To see Apps on the Home page, you might have to click More controls at the bottom. 

  3. Select Coupa.
  4. At the top right of the gray box, click Edit Service Compose.

  5. To turn on or off a service for everyone in your organization, click On for everyone or Off for everyone, and then click Save.

  6. To turn on or off a service only for users in an organizational unit:

    1. At the left, select the organizational unit.
    2. Select On or Off.
    3. To keep the service turned on or off even when the service is turned on or off for the parent organizational unit, click Override.
    4. If the organization's status is already Overridden, choose an option:
      • Inherit—Reverts to the same setting as its parent.
      • Save—Saves your new setting (even if the parent setting changes).

    Learn more about organizational structure.

  7. Ensure that your Coupa user account email IDs match those in your Google domain.
Step 5: Verify that the SSO is working
  1. Open the Coupa Instance URL googleidentity.coupacloud.com.
    You should be automatically redirected to the Google sign in page.
  2. Enter your sign in credentials.
  3. After your sign in credentials are authenticated you will be automatically redirected back to Coupa.
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