Page History

...

cat SF-SSO.php SF-SSO-2.php SF-SSO-3.php > /var/simplesamlphp/metadata/saml20-idp-remote.php

This creates entries in the metadata array for each IdP.  The keys in this array are used in the next step

$metadata['https://drcloudehr-idd-qa-dev-ed.develop.my.salesforce.com'] = array (
  'entityid' => 'https://drcloudehr-idd-qa-dev-ed.develop.my.salesforce.com',
  'entityDescriptor' => 'PG1kOkVu....

Changes to /var/simplesamlphp/config/authsources.php

...

'sp1' => [
    'saml:SP',
  'entityID' => 'https://drcloudehr-idd-qa-dev-ed.develop.my.salesforce.com',

  'idp'      => 'https://drcloudehr-idd-qa-dev-ed.develop.my.salesforce.com',
 ],
'sp2' => [
    'saml:SP',
  'entityID' => 'https://okta.com/',   
  'idp'      => 'https://okta.com/',
],

The entityID and idp are keys to the metadata array defined in saml20-idp-remote.php file that was updated in the previous step.

The entityId and the idp entries are set to the same value to eliminate the step of choosing an IdP when logging in. 

Changes to /var/simplesamlphp/metadata/dc-idp-mapping.php

...