How to provide certificate from a Entra ID app app registration

We are trying to impose SSO for Dell powerstore. The wizard is asking us to retrieve certificate from your identity provider(iDP), then import, or past. the certificate needs to be in PEM format. Please suggest the best practise to provide certificate from iDP.

Import the IdP CA Certificate

To import the IdP CA certificate, use one of the following methods:

Select Select Certificate File, locate and select the CA certificate file, and click Next.

Select Paste Certificate Text, copy and paste the CA certificate text into the text box, and click Next.

Note: A server CA certificate may have already been imported. If so, click Next. If necessary, additional certificates can be entered after the wizard is completed.

Cheers

Priya