Depending on whether IdP is available in eduGAIN, following possibilities exist:
IdPs that are available in eduGAIN will be automatically integrated. Please refer to Attribute Requirements for further specification on requirements. You can check if your IdP is registered at https://release-check.edugain.org/
IdPs that are not available in eduGAIN will be integrated on a request basis. Please refer to Requirements for directly integrated IdPs for further specification on requirements.