Different SAML login emails per SaaS app

We want to create access to different SaaS apps, for example we access two Microsoft 365 instances.
User A in cloudflare has a user id of [email protected]; he will login into Office 365 with [email protected] and another office 365 instance with [email protected].
How do we specify what the email address is that cloudflare sends to the SaaS SAML app for the user since its not the same email as the cloudflare user’s email.