Last Updated: February 27, 2026
ISSUE
Users on Monthly Enterprise Channel (MEC) version 2512 using Cloud Updates are observing repeated update, download, and apply behavior even though Office remains on the same build (2512). In some cases, Office apps such as Outlook and Excel are found closed unexpectedly after a device lock/unlock cycle, followed by Office showing an update available despite already being on the latest build.
Symptoms:
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Devices updated to 2512 build 19530.20226, then repeatedly initiated download activity without an expected version/config change
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Clicking Update triggers download and apply of additional files under: Program Files\Microsoft Office\Updates (Download / Apply folders).
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After update completes, Office build version remains unchanged.
Note:Â This affects builds 2511 and onwards
STATUS: FIXED
Microsoft identified an issue in the Microsoft 365 Apps update workflow where the integrity verification step could repeatedly trigger a full content download when updating to Monthly Enterprise Channel version 2512. This could result in excessive download traffic even on devices already updated. Microsoft has addressed the issue via a hotfix; until remediation is applied, temporary mitigations may include pausing update deployment waves and controlling CDN traffic to reduce network impact.
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See Also
Fixes or workarounds for recent Office installation or activation issues
