Microsoft 365 apps can now update overnight, even if left open

Microsoft Office
(Image credit: Windows Central)

What you need to know

  • Microsoft 365 apps can now perform an update while a machine is in idle or locked mode, even if the applications are left running.
  • The capability is known as "update under lock," and it uses Microsoft's Click-To-Run technology.
  • Office apps will find a safe time to update and implement the changes in a process that takes roughly four seconds.

Microsoft 365 apps, including Word, Excel, and PowerPoint, can now perform updates while a system is idle or locked. The new feature is called "update under lock," and it utilizes Microsoft's Click-To-Run technology. When enabled, update under lock will find a safe time to shut down an app, perform an update, and then restore closed apps to their previous state.

Microsoft shares an example of when the new feature could be useful in a Tech Community post

"A common scenario is for users to leave apps open on their device for extended periods of time. For example, if a user is working on a Word document at the end of the day, they may leave the document open and lock the device intending to continue working on it the next day. When users leave their documents open in this manner, it prevents Office from applying updates. With this feature, the user will come back to a machine in its previous state, but they will be running the latest bits." 

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Update under lock will not shut down an app when it's unsafe to do so, such as when a macro is running or the document has unsaved changes. 

The following Windows devices will be affected by the change:

Windows devices only for

  • Microsoft 365 subscriptions, Visio, Project, but not Microsoft Teams, which has its own update process
  • Retail consumer/perpetual Office 2016, 2019, and 2021

All devices, regardless of update endpoint, that are receiving updates from:

  • Current Channel: Version 2109 or later
  • Monthly Enterprise Channel: Version 2112 or later
  • Semi-Annual Enterprise Channel (Preview): Version 2202 or later  
  • Semi-Annual Enterprise Channel: Version 2208 or later (coming Jan 2023)
Sean Endicott
News Writer

Sean Endicott is a News Writer at Windows Central, where he covers Windows 11, Surface hardware, Microsoft 365, AI, apps, and the broader PC ecosystem. Since joining the site in 2017, he has written well over a thousand articles across the Microsoft landscape, covering breaking news, analysis, and feature reporting.

He writes Windows Wrap, a weekly column covering the biggest stories in Windows and the PC industry, and what they mean for the platform going forward.

Before joining Windows Central full-time, Sean worked in journalism and media production after earning a First Class degree in Broadcast Journalism from Nottingham Trent University. Outside of tech, he is an award-winning American football coach based in Nottingham, England, and was named BAFCA Youth Coach of the Year in 2024.