To test SAML, use a Versal organization account that has Admin permissions enabled. The test user email address must match across platforms.
You may do this via the Versal API or through your organization account on the Versal site.
Instructions for creating a user with the Versal API are here.
To create the test user on Versal:
Go to https://versal.com/register and create a new user. The email address of the Versal account must match the email address of the Azure account for this to work properly.
Go to your organization account as an Administrator and invite the test user to the organization. A verification email will be sent to the test user.
Access the test user's email and accept the Versal invitation to join the organization.