← Rollouts
lowbetaRolling out

16.0.20626.15200

from 16.0.20619.15190

Office.js build 16.0.20626.15200 is rolling out to the beta CDN (first seen 2 Nov 2026, 22:20 UTC, 1% of sampled edges). Only preview or undocumented APIs changed.

Edges on new version

legacyappsforoffice.microsoft.com
1%of sampled edges (average over the last hour)
onecdnofficeapis.public.onecdn.static.microsoft
1%of sampled edges (average over the last hour)

Host files both endpoints serve on this build are byte-identical. New version seen on onecdn only (6): excel-win32-16.01.js, onenote-ios-16.00.js, onenote-web-16.00.js, powerpoint-win32-16.01.js, visio-win32-16.00.js, word-mac-16.00.js. New version seen on legacy only (5): excel-android-16.00.js, excel-mac-16.00.js, onenote-mac-16.00.js, onenote-winrt-16.00.js, powerpoint-web-16.00.js. Shares are averages over all sampled responses; a file listed here hasn't served the new version on the other endpoint in any sample yet. What differs between the endpoints

First seen
2 h ago · 2 Nov 2026, 22:20 UTC
Last seen
28 min ago · 3 Nov 2026, 00:50 UTC
Files
8 · 6 seen on onecdn only · 5 on legacy only
API changes
7 in 8 files
Observed from
eu

API changes (7)

API
Change
Severity
Files
Excel.CustomFunctionProxy
undocumented
Implementation
low
excel-mac 16.00
Excel.CustomFunctionProxy.setCustomFunctionAssociation
undocumented
Implementation
low
excel-mac 16.00
Excel.CustomFunctionProxy.setCustomFunctionInvoker
undocumented
Implementation
low
excel-mac 16.00
OfficeCore.RibbonButton.actionId
property undocumented
Added
low
onenote-winrt 16.00word-web 16.00excel-android 16.00word-ios 16.00+4
OfficeCore.RibbonButton.icon
property undocumented
Added
low
onenote-winrt 16.00word-web 16.00excel-android 16.00word-ios 16.00+4
OfficeCore.RibbonButton.set
undocumented
Implementation
low
onenote-winrt 16.00word-web 16.00excel-android 16.00word-ios 16.00+4
OfficeCore.RibbonButton.toJSON
undocumented
Implementation
low
onenote-winrt 16.00word-web 16.00excel-android 16.00word-ios 16.00+4