Microsoft is killing perpetual Office licenses on July 13, 2026. Microsoft’s digital licensing certificate will expire, which will transform Word, Excel, and PowerPoint into read-only apps. These apps will still be able to open documents, but they will not be able to edit, save, or create new files.
Currently, this only affects Apple versions of Office (Office 2019 for Mac) to be specific.
Why Office for Mac?
Microsoft uses app signing and licensing certificates to sign and validate Office apps on Apple platforms (macOS and iOS), allowing Apple’s security system to recognize them and ensure they remain fully functional. If one of these certificates expires or is replaced and an older Office build hasn’t been updated, macOS or iOS may stop trusting that version fully, which can lead to reduced functionality, such as losing the ability to edit or save, until the user installs an updated Office build with a renewed certificate. Although Microsoft could easily issue a renewed certificate, they have chosen not to.
Microsoft Messaging
Microsoft’s messaging evolved as the deadline approached. Initially, messaging was along the lines that Office apps would “continue to function” after support ended. This early assurance of continued functionality gradually changed to the current message that data will be preserved, even if the software will not be able to edit or save it. This will obviously disrupt workflows.
What Can You Do?
Spend money! Microsoft recommends buying a new version or subscribing to Office 365.
Could Microsoft Expire Windows Office Certificates?
Technically, yes. Microsoft already controls the following: the Office activation system, the Office update channels, the cryptographic signing of Office builds, and the licensing enforcement logic. However, it would be more difficult. Microsoft has a huge enterprise perpetual install base, so this would trigger pushback from enterprises.
The Future
Nevertheless, it is clear that Microsoft is attempting to phase out one-time purchases of Microsoft Office (such as Office 2021 or earlier ‘lifetime’ licenses) in favor of the subscription-based Microsoft 365 model. There is a concern that perpetual Office licenses may eventually only receive security updates (or limited support), while new features will be exclusive to Microsoft 365.
Microsoft is effectively steering users away from one-time purchases and towards subscriptions as the default model.
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