MSOLSpray

The script logs if a user cred is valid, if MFA is enabled on the account, if a tenant doesn't exist, if a user doesn't exist, if the account is\ locked, or if the account is disabled.

There are other password spraying tools for O365/Azure but the main difference with this one is that this tool not only is looking for valid passwords, but also the extremely verbose information Azure AD error codes give you. These error codes provide information relating to if MFA is enabled on the account, if a tenant doesn't exist, if a user doesn't exist, if the account is locked, if the account is disabled, if the password is expired and much more.

So this doubles, as not only a password spraying tool but also a Microsoft Online recon tool that will provide account/domain enumeration. In limited testing it appears that on valid login to the Microsoft Online OAuth2 endpoint it isn't auto-triggering MFA texts/push notifications making this really useful for finding valid creds without alerting the target.

Lastly, this tool works well with FireProx to rotate source IP addresses on authentication requests. In testing this appeared to avoid getting blocked by Azure Smart Lockout.