16.0.20626.15200
from 16.0.20619.15190
Office.js build 16.0.20626.15200 is rolling out to the production CDN (first seen 2 Nov 2026, 22:50 UTC, 2% of sampled edges). Only preview or undocumented APIs changed.
Edges on new version
legacyappsforoffice.microsoft.com
2%of sampled edges (average over the last hour)
onecdnofficeapis.public.onecdn.static.microsoft
not seen yet
Seen on legacy only so far.
- First seen
- 2 h ago · 2 Nov 2026, 22:50 UTC
- Last seen
- 7 min ago · 3 Nov 2026, 01:10 UTC
- Files
- 8 · 5 seen 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 16.00excel-web 16.00excel-win32 16.01
Implementation
low
excel-mac 16.00excel-web 16.00excel-win32 16.01
Implementation
low
excel-mac 16.00excel-web 16.00excel-win32 16.01
OfficeCore.RibbonButton.actionId
property undocumented
Added
low
excel-mac 16.00excel-web 16.00excel-ios 16.00powerpoint-ios 16.00+4
OfficeCore.RibbonButton.icon
property undocumented
Added
low
excel-mac 16.00excel-web 16.00excel-ios 16.00powerpoint-ios 16.00+4
OfficeCore.RibbonButton.set
undocumented
Implementation
low
excel-mac 16.00excel-web 16.00excel-ios 16.00powerpoint-ios 16.00+4
OfficeCore.RibbonButton.toJSON
undocumented
Implementation
low
excel-mac 16.00excel-web 16.00excel-ios 16.00powerpoint-ios 16.00+4