In most cases your SAML SP software will work with the SAMLDS protocol that the OpenAthens discovery service expects and it is just a case of configuring it.
For both OpenAthens SP and OpenAthens Cloud SP, the procedure is the essentially the same.
Cloud SP will start to use the discovery service immediately. OpenAthens SP will need a webserver restart to pick up the change.
See also: PLACEHOLDER
Add a discovery response binding to your metadata in the <Extensions> section- e.g:
<Extensions> ... <disco:DiscoveryResponse Binding="urn:oasis:names:tc:SAML:profiles:SSO:idp-discovery-protocol" Location="https://shibsp.yourdomain.com/Shibboleth.sso/DS" index="1"/> ... </Extensions>
PLACEHOLDER - ALSO DO WHATEVER THE THING IS THAT SENDS USERS TO THE DISCOVERY SERVICE IN THE FIRST PLACE - SOMETHING FROM HERE PROBABLY https://wiki.shibboleth.net/confluence/display/SHIB2/NativeSPServiceSSO