Office documents will have a new default theme, including a new font, color palette, and updated line weights. The change will affect Word, Excel, PowerPoint, and Outlook on various endpoints. No action is needed to prepare for the change. The rollout will start mid-December 2023 and be fully rolled out by late March 2024.
Applies to: Microsoft 365 apps
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).