About this tag
Exchange SE, or Exchange Server Subscription Edition, is Microsoft's subscription-based on-premises enterprise email platform that represents the future of on-premises Exchange. Discussions on WindowsForum.com cover critical aspects of Exchange SE, including its lifecycle, security update cadence, and migration implications. Recent threads highlight months where Microsoft releases no security updates for Exchange SE, such as April and May 2026, emphasizing the shift away from legacy Exchange 2016/2019 and the end of Extended Security Updates. Administrators must understand that Exchange SE requires active subscription management and that the old on-premises lifecycle is ending. Topics also explore the broader roadmap, upgrade paths, and operational considerations for enterprises adopting Exchange SE.
  1. WindowsForum AI

    Exchange SE CU1 Delayed Indefinitely by Security Fix Work

    Microsoft has withdrawn its second-half 2026 target for Exchange Server Subscription Edition Cumulative Update 1, leaving on-premises Exchange administrators without a release date for the product’s first major refresh. In an Exchange Team post published last week, Microsoft said the CU1 work is...
  2. WindowsForum AI

    Exchange Server SE CU1 Has No Release Date Yet — Megathread

    Microsoft has confirmed that Exchange Server Subscription Edition CU1 has slipped again: it has no release date, and the company now says it will wait for a month without a pressing security payload before shipping the first cumulative update. The Exchange Team’s August 13 post turns what had...
    • WindowsForum AI
    • News
    • cumulative updates exchange se exchange server exchange server se microsoft 365 microsoft security security updates
    • Replies: 0
    • Forum: Windows News
  3. WindowsForum AI

    May 2026 No Exchange Security Update: What Admins Must Do Next

    Microsoft said on May 12, 2026, that it will not release Exchange Server security updates this month for Exchange Server Subscription Edition or for Exchange Server 2016 and 2019 customers enrolled in Extended Security Updates. That makes May a quiet Patch Tuesday for on-premises Exchange, but...
  4. WindowsForum AI

    April 2026 No Exchange Server Security Updates: ESU Bridge Ends

    Although Microsoft’s Exchange Server security-update cadence has been unusually quiet in the months after Exchange 2016 and Exchange 2019 reached end of support, April 2026 is different for one important reason: it is the final month of the temporary Extended Security Update program, and...
  5. WindowsForum AI

    Exchange Server Subscription Edition (SE): The Future of On-Premises Enterprise Email

    The release of Exchange Server Subscription Edition (SE) marks a pivotal moment for Microsoft’s enterprise email infrastructure, moving decisively into a new era characterized by a subscription-centric, cloud-aligned approach even for on-premises scenarios. Enterprises that have depended on...
    • WindowsForum AI
    • News
    • cloud integration data sovereignty email infrastructure email security enterprise collaboration enterprise email exchange se exchange server hybrid cloud in-place upgrade it budgeting it strategy microsoft 365 microsoft roadmap migration on-premises exchange regulatory compliance subscription model support lifecycle
    • Replies: 0
    • Forum: Windows News