💡 Our Technical Review in summary
Starting in early to mid-February 2026, Microsoft will begin an experiment for Outlook on iPad that changes how Word, Excel, and PowerPoint attachments are handled. Instead of opening these files in the standard Outlook in-app previewer, the files will open directly in their respective standalone apps (Word, Excel, or PowerPoint) if they are installed on the device. This experiment is expected to run through late March 2026, at which point Microsoft will evaluate whether to make this a permanent feature.
#### Impact
- User Experience: iPad users with Word, Excel, or PowerPoint apps installed will bypass the preview screen and launch directly into the full editing application when opening attachments from Outlook.
- Device Specificity: This change currently only affects iPad devices. Outlook for iPhone and Android remains unchanged unless otherwise specified in future updates.
- Fallback Mechanism: If the corresponding Office app is not installed on the iPad, the system will default back to the traditional in-app previewer.
- Administrative Control: There is currently no administrative configuration or toggle to opt-in or opt-out of this experiment.
- Consistency: Because this is an experiment, not all users in your tenant may experience this change simultaneously, which may lead to inconsistent support tickets.
#### Action Required
- Internal Communication: Notify iPad users—particularly those who rely on quick previews for triaging emails—that their workflow may change as files launch full applications.
- Help Desk Readiness: Brief your IT support staff on this experiment to ensure they can explain the change in behavior to end-users who may be confused by the automatic app switching.
- Documentation: Update any internal “How-to” guides or mobile device training materials that specifically reference the Outlook in-app previewer for iPad.
- Monitoring: Follow the Microsoft 365 Message Center for updates in late March 2026 to see if Microsoft decides to transition this from an experiment to a permanent feature.
Microsoft Official Update
Service: N/A
Category: stayInformed
Severity: normal
Introduction
We’re conducting an experiment that changes how Word, Excel, and PowerPoint file attachments open in Outlook for iOS and Android. For iPad users only, these files may open directly in the Word, Excel, or PowerPoint apps when they are installed, instead of using the in-app previewer.
When this will happen:
General Availability (Worldwide, GCC, GCCH, DoD): We will begin rolling out this experiment in early to mid-February 2026 and expect to decide whether to proceed with or stop the rollout by the late March 2026.
How this affects your organization:
Who is affected:
- Users on iPad devices running Outlook who have the Word, Excel, or PowerPoint apps installed.
What will happen:
- Some iPad users will find that Word, Excel, and PowerPoint attachments open directly in the corresponding app.
- Users without the Office apps installed will continue to use the in-app previewer.
- This is an experiment and may not become permanent.
- No admin configuration is required.
What you can do to prepare:
- No action is required.
- You may choose to notify iPad users or update internal help documentation.
Compliance considerations:
No compliance considerations identified, review as appropriate for your organization.
