Microsoft Azure PowerShell: Relay cmdlets

Microsoft Azure PowerShell - Relay service cmdlets for Azure Resource Manager

Windows SMB signing and security audit toolkit — SMB signing status, encryption, dialect negotiation, and relay attack defense

Windows SMTP server audit toolkit — virtual servers, relay restrictions, authentication, queue, and delivery status

Windows SMTP relay and mail configuration audit toolkit — SMTP service status, relay settings, queue monitoring, and mail flow testing

Answers one question before December 2026: which mailboxes in this tenant can still send with a username and password, and will therefore stop when Microsoft disables SMTP AUTH Basic authentication by default at the end of that month. Printers, scanners, MFPs, NAS units and scripts are what break, and the error they will report is 535 5.7.139. Rea... More info