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Each pack covers one Microsoft 365 change with a deadline: what it is, who's affected, and the scripts and templates to handle it across every client tenant.

PACK #001
Oct 19, 2026

SMTP AUTH Basic Auth: off by default, end of Dec 2026

Microsoft will disable Basic authentication for SMTP AUTH by default in existing Exchange Online tenants at the end of December 2026. Scan-to-email copiers and older line-of-business apps are the usual casualties. Find them now, while there's time to fix them before the holidays.

Action needed
Deadline: End of December 2026
MSP Change Desk
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