Guides for setting up SSO based on your identity provider:
Setting Up Single Sign-On (SSO) with Azure Entra
Setting Up Single Sign-On (SSO) with Keycloak
Setting Up Single Sign-On (SSO) with Okta
Setting Up Single Sign-On (SSO) with Google Workspace
Guides for setting up connections on-prem:
How to Get Your AWS S3 Connection Credentials
How to Create a SharePoint OAuth2 App
How to setup Sharepoint With Restricted Access to the Selected Sites