This information is for employees using Microsoft 365 through their organization.
Important: To keep Microsoft 365 apps working normally, an update is required by July 13, 2026. If your apps are not updated, Word, Excel, PowerPoint, Outlook, and OneNote will enter reduced functionality mode, where you can open and view files, but can’t edit, save or access full features. In most cases, updating your apps will prevent this issue.
Your files are safe — this is not a security issue. Your apps need an update to use the renewed certificate that verifies the license that keeps Microsoft 365 apps up-to-date and working correctly.Â
This issue only affects macOS and iOS devices. Windows and Android devices are not affected.
What you need to do
Check with your IT administrator
If your macOS or iOS device is managed by your organization, your IT administrator may already be deploying the required update. Contact your organization’s help desk to confirm whether the update is being pushed to your device.
Tip:Â Not sure whether your device is managed? On a Mac, go to System Settings > Privacy & Security > Profiles. On iPhone or iPad, go to Settings > General > VPN & Device Management. If you have a management profile from your organization, your device is managed.
Try updating your apps
If your organization allows you to update apps, follow these steps:
On a Mac:
-
Open any Office app (such as Word, Excel, PowerPoint, Outlook, or OneNote).
-
In the menu bar, select Help > Check for Updates.
-
If Microsoft AutoUpdate opens, select Update or Update All.
-
After the update finishes, restart the app.
On iPhone or iPad:
-
Open the App Store.
-
Tap your profile picture in the top of the app.
-
Scroll down and tap Update next to any Microsoft 365 app or tap Update All.
-
After updating, open the app and sign in if prompted.
Note: If the update is not available or is blocked, your organization may manage updates for your apps. Contact your IT administrator or your organization’s help desk for assistance.
Use Microsoft 365 on the web while you wait
If you need to continue using the apps while waiting for an update, you can use Microsoft 365 apps for the web. To get started, go to microsoft365.com on any supported web browser, and sign in with your work or school account.
Minimum OS version requirements
Before you can update your apps, your device must be using the following minimum operating system versions:
Note: If your device can’t update to the required minimum operating system version, contact your organization’s help desk.
|
Device |
Minimum OS required |
Minimum app version |
|---|---|---|
|
Mac |
macOS 12 (Monterey) or later |
16.83 |
|
iPhone / iPad |
iOS 17.0 or later |
2.93 |
Frequently asked questions
Are my files safe?Â
Yes. The certificate is used to validate your Office License. It does not affect the security of your files or device.Â
Does this affect Windows or Android?Â
No. This issue only affects Microsoft 365 apps on devices running older versions of macOS and iOS.Â
What should I do if I can’t update?Â
Your organization may manage when updates are installed on your device. Contact your organization’s help desk and let them know you need the Microsoft 365 app update that includes the renewed security certificate.
What if apps are still in reduced functionality mode after updating?Â
Try these steps:
-
Quit the app completely by using Command + Q or select the app name in the menu bar, and then select Quit.
-
Open the app.
-
Go to the app's Account settings, sign out, and then sign in again with your work or school account.
If you continue to experience reduced functionality mode after following these steps, contact your organization’s help desk.
See Also
Update Microsoft 365 or Office on your macOS or iOS device ​​​​​​​(for personal subscribers)Â
Need more help?
Contact your organization's help desk for support with managed devices.Â
