Here's how you can get the SHA-256 fingerprint from the admin console of the Identity Provider.
Azure
- Go to your Azure portal
 - Navigate to Azure Active Directory -> Enterprise Applications -> All Applications
 - Search and open the Freshservice application that you have configured
 - Click Quick Start and select Configure Single Sign-On
 - Select Configure Freshservice on the configure SSO page
 - This will open the configure singe-sign on screen on the right side
 - Download the SAML XML Metadata 
 - In the metadata, copy all the content that is between <X509Certificate> and </X509Certificate>
 Follow the steps at the end of this solution article under the heading "Generating the fingerprint from the XML content".
Okta
- Go to the Okta admin console and select Freshservice from the Applications list
 - Select the Sign On tab
 - Download the Metadata 
 - In the metadata, copy all the content that is between <X509Certificate> and </X509Certificate>
 - Follow the steps at the end of this solution article under the heading "Generating the fingerprint from the XML content".
 
OneLogin
- Go to the OneLogin admin console
 - Navigate to Apps -> Company Apps -> Freshservice
 - Go to the SSO Tab and select SHA 256 under the SAML Signature Algorithm dropdown and click View Details
 - Select SHA 256 from the drop down. This will generate a new fingerprint
 - Copy fingerprint and use it in Freshservice
 
Generating Fingerprint from the XML content
- Go to https://www.samltool.com/fingerprint.php
 - Follow the steps as shown in the below screenshot

 
If you run into issues in this process, please reach out to Freshservice support at support@freshservice.com