Step 1: Download
the Coupa metadata fileCoupa Software is a global technology platform for Business Spend Management (see https://www.coupa.com). You can protect access to Coupa by integrating Coupa with Identity as a Service. Once integrated, users can use single sign-on to log in to their Coupa account through Identity as a Service.
Note: This integration was tested using Identity as a Service version 5.11 and Coupa version Stable_028.1.2. Other versions of Coupa may require integration and configuration steps that differ from those documented in this procedure. For other versions of Coupa, this integration guide may be used as an initial approach for integrating Coupa. In the event of other issues, contact support@entrust.com for assistance.
Step 1: Download
the Coupa metadata fileDownload the Coupa metadata file. You use this file when you Add Coupa to Identity as a Service.
1. Log in to Coupa.
2. Click Setup. The Setup page appears.
3. Under Company Setup, click Security Controls. The Security Credentials page appears.
4. Scroll to Sign in using SAML and click Download and import SP metadata. You need this file in Step 2: Add Coupa to Identity as a Service.
Step 2: Add
Coupa to Identity as a Service
Add Coupa as an application to Identity as a Service
1. Log into your Identity as a Service administrator account.
2. Click
> Security > Applications. The Applications
Lists page appears.
3. Click Add. The Select an Application Template page appears.
4. Do one of the following:
● Select SAML Cloud Integrations from the search drop-down list and scroll to find the application you want to add to IDaaS.
- or -
● In the Search bar, enter a search option to filter for the application you want to add to IDaaS.
5. Click Coupa. The Add Coupa page appears.
6. Enter an Application Name.
7. Enter an Application Description.
8. Optional. Add a custom application logo.
a. Click 
next to Application Logo. The
Upload Logo dialog box appears.
b. Click 
to
select an image file to upload.
c. Browse to select your file and click Open. The Upload Logo dialog box reappears showing your selected image.
d. If required, resize your image.
e. Click OK.
9. Select the Authentication Flow that appears to users during login.
10. Click Next. The General page appears.
11. Click
to the Upload Metadata XML
and browse to the location of the metadata file you downloaded
in Step 1: Download the Coupa metadata file.
The Metadata Configuration dialog box appears.
a. If required, click Merge with existing values to merge new values with existing values for Alternative Assertion Consumer Services URLs and SAML attribute names.
b. Click Save.
12. Optional. Enter the SAML Username Parameter Name used to identity the user ID being requested for authentication. The user ID can then be passed as a parameter, for example, Username=jdoe.
13. Enter the SAML Session Timeout to the time when the SAML Assertion times out. The maximum is 720 minutes.
14. Enter the Max Authentication Age (seconds) to set the maximum amount of time that can elapse before a user is required to reauthenticate during a new login attempt. This applies for both SP-initiated and IDP-initiated login. Set this field to -1 to disable this feature.
15. In the Single Logout Service URL field enter https://www.coupa.com.
16. From the SAML NameID Attribute drop-down list, select Email.
17. Select the SAML Signing Certificate from the drop-down list.
18. Optional: Select Respond Immediately for Unsuccessful Responses to return to the application immediately after a login failure, rather than allow user to try again with a different userID.
19. Deselect Enable Go Back Button if you do not want users to be able to go back to the Coupa login page to log in.
20. Select Show Default Assertion Consumer URL Service in the My Profile. When selected, the Default Assertion Consumer URL appears in a user's My Profile page in addition to relay states and Alternative Assertion Consumer URLs.
21. Optional. Add Alternative Assertion Consumer Service URLs, as follows:
a. Click Add.
b. Enter a Name.
c. Enter a URL Value.
d. Select Show in My Profile to display the Alternative Consumer Service URL in a user's My profile page.
e. Optional. Add an Application Logo.
f. Click Add.
g. Repeat these steps to add more Alternative Assertion Consumer Service URLs.
22. For the IDP initiated login to be successful, you need to set up Coupa SP-Init-SSO. Coupa can also set up IdP-Init-SSO. IdP-Init-SSO requires IDP to send the Relay State parameter along with the SAML request. You can do this by editing the metadata xml file or setting a Relay state value. Relay states appear on the user's My Profile page. Do the following:
a. Under Relay State, click Add. The Add Relay State dialog box appears.
b. Enter Coupa in the relay Name field.
c. Enter the Value for the relay state. This setting specifies the application
or URL that a user is redirected to after successful authentication.
For example, https://<coupa-instance-domain-name>/sessions/saml_post.
d. Select Show in My Profile to display the relay state on the user's My Profile page.
Notes: After
you add relay states, you can also enable or disable them on the Add/Edit
application page. Click 
next to the relay state to disable it or click 
to re-enable it.
Relay states apply to the Default Assertion Consumer Service URLs and
not the Alternative Assertion Consumers URLs.
e. Repeat these steps to add the URLs of Third Party apps. For example:
– https://success.coupa.com/Integrate/Technical_Documentation/SSO/02_Coupa_SSO_Setup
– https://success.coupa.com/Integrate/Technical_Documentation/SSO/01_SAML_Basics
– https://success.coupa.com/Integrate/Technical_Documentation/SSO/03_SAML_FAQ
23. Click Submit.
Step 4: Download
the metadata file from Identity as a ServiceDownload the Metadata file from Identity as a Service
1. In Identity as a Service, click
> Security > Applications.
The Applications List page appears.
2. Do one of the following:
● Click
next to the application you are integrating
with Identity as a Service.
–or–
● Click
next to the application you are integrating
with Identity as a Service and select SAML IDP Metadata.
The SAML Application Metadata dialog box appears.
3. Select the certificate to include in the SAML IDP Metadata file from the drop-down list.
4. If applicable, Select the domain to include in the SAML IDP Metadata file from the drop-down list.
5. Enter the Lifetime, in days, for the SAML IDP Metadata file. The value must be between 2 and 730.
6. Do one of the following, as required:
a. Copy the Public Endpoint to paste into your SAML application being used Identity Provider authentication.
b. Click Download.
Note: If you are using multiple domains, you must download each domain's metadata file separately because the values in the metadata file vary for each domain.
Step 5: Upload
the metadata file from Identity as a Service1. Log in to Coupa.
2. Click Setup. The Setup page appears.
3. Under Company Setup, click Security Controls. The Security Credentials page appears.
4. Scroll to Sign in using SAML and click IdP metadata.
5. Browse to select the metadata file you downloaded in Step 4: Download the metadata file from Identity as a Service.
6. Click Save.
7. Click Save again. You are returned to the Security Controls page. A SAML Connection was successfully saved message appears.
Testing Service Provider Login
1. Open a Web browser and enter the URL for your Coupa account. You are directed to Identity as a Service.
2. Enter your Coupa account User ID and click Next.
3. Respond to the second-factor authentication challenge. If you respond successfully, you are logged into Coupa.
Testing Identity as a Service redirect log in
1. Log in to your Identity as a Service account.
2. Go to your My Profile page if you are not already there.
3. Under Applications, click Coupa.
4. Respond to the second-factor authentication challenge. If you respond successfully, you are logged into Coupa.