Hi @Sahadeb Patro • Thank you for reaching out.
When using Graph API to create and set up single-sign-on for enterprise applications, you have to manually specify the value of all required properties. As of now, you cannot use Graph API or Powershell to upload the Manifest to auto-populate the required fields under single-sign-on.
Currently, supported operations for configuring SSO settings under Enterprise applications are documented here: https://learn.microsoft.com/en-us/graph/application-saml-sso-configure-api
You may consider posting feedback at the [Azure Feedback Portal][1], which is monitored by the product team for feature enhancements.
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[1]: https://feedback.azure.com