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The End of Legacy: Surviving EWS, Basic Auth and SMTP AUTH Retirements

Date
Time (local)
15:00 – 16:00
Venue
Opfikon

About this event

Practical playbook for dealing with the retirement of EWS and SMTP AUTH Basic in Exchange Online. Covers current timelines, the EWS allow list as a temporary bridge, alternatives for client submission, and how to find and remediate hidden dependencies before they fail.

Legacy protocols do not disappear with a bang — they disappear tenant by tenant, often starting with a scanner or ERP system that silently stops sending mail.

This session is a practical playbook for surviving the retirement of EWS and SMTP AUTH Basic. You get a clear view of the current timelines (EWS phased disablement through April 2027, SMTP AUTH Basic changes from late 2026), learn how the EWS allow list buys time, and see the real alternatives for devices that still use username-and-password client submission. The focus is on discovery: combining usage reports, Entra sign-in logs and business interviews to find every dependency — including the ones that only run once a year. You leave with a five-step migration playbook from inventory to controlled enforcement.

What you will take away

    Agenda

    1. Time:

      until 15:15

      Where we are now

      Speaker: Drago Petrovic

    2. Time:

      until 15:30

      EWS: allow list & Graph migration

      Speaker: Drago Petrovic

    3. Time:

      until 15:40

      SMTP AUTH: the long goodbye

      Speaker: Drago Petrovic

    4. Time:

      until 15:50

      Finding hidden dependencies

      Speaker: Drago Petrovic

    5. Time:

      until 16:00

      Your migration playbook

      Speaker: Drago Petrovic

    Speakers

    • Drago Petrovic

      Drago Petrovic

      Chief Technology Officer, dotCLOUD | MSB365

      Drago is a Microsoft MVP with over 20 years of experience in IT infrastructure, cloud solutions, and enterprise collaboration. He specializes in Microsoft 365, Azure, and PowerShell automation. Drago is passionate about sharing knowledge and helping organizations leverage Microsoft technologies to improve productivity and security.

    Location

    Opfikon

    Dufaux Strasse 18152 Opfikon

    Meeting roomKameha Grand Zürich

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