Why does the company login page not appear even after enabling identity provider?

If an existing identity provider that wasn't created through Security Console was enabled before enabling single sign-on, then single sign-on isn't enabled.

Do these steps:

1. On the Security Console, click the Single Sign-On tab.

2. From the list of existing identity providers, click the identity provider that you want to update.

3. Click the Diagnostics and Activation tab and click Edit.

4. Clear the Enable Identity Provider option to disable the identity provider and click Save and Close.

5. On the Diagnostics and Activation page, click Edit again.

6. Click Test to test the identity provider. Click Yes in the warning message that appears to open the Initiate Federation SSO page.

7. Select the identity provider from the Partner drop-down list.

8. Click Start SSO. You are prompted to authenticate the identity provider. On successful authentication, a test result page appears.

9. On the Diagnostics and Activation details page, select Enable Identity Provider.

10. Click Save and Close to return to the Diagnostics and Activation page.

11. Click Done to return to the Single Sign-On page. In the Single Sign-On Configuration section, Single Sign-On Enabled has a tick mark to indicate that single sign-on has been enabled.

After enabling single sign-on, you can now see the company login page.