💡 Our Technical Review in summary
Summary
- Microsoft is transitioning the “Events from email” feature in Outlook from legacy extraction methods to Schema.org markup standards.
- The legacy extraction system is currently failing, resulting in incorrect or missing calendar events (e.g., flights, hotel reservations, and car rentals).
- Microsoft has stated that it is technically impossible to improve or fix the legacy stack; therefore, any provider not using Schema.org will see a continued degradation in service reliability.
- Currently, approximately 94% of service providers are still using the legacy system and are at risk of service failure.
Impact
- End Users: Users who rely on Outlook to automatically add travel and delivery confirmations to their calendars may notice events are missing, duplicated, or contain incorrect information.
- Reliability: Only emails containing Schema.org markup will continue to generate reliable calendar entries moving forward.
- IT Helpdesk: Organizations may experience an increase in support tickets related to Outlook calendar synchronization and automated event extraction issues.
- Engagement: Microsoft reports that providers using Schema.org see up to 30% higher user engagement compared to the legacy system.
Action Required
- Identify Partners: Review your organization’s corporate travel agencies, booking partners, and delivery services to determine who sends confirmation emails to your employees.
- Contact Providers: Reach out to these third-party providers and request that they adopt Schema.org markup for their transactional emails to ensure Outlook compatibility.
- Coordinate with Microsoft: For assistance with onboarding or to whitelist specific provider domains, contact the Microsoft team at [email protected]. Provide the partner’s contact details and the sending domains.
- Internal Communication: Brief your IT helpdesk staff on this change so they can properly diagnose “missing event” reports as provider-side schema issues rather than Outlook client bugs.
Microsoft Official Update
Service: N/A
Category: planForChange
Severity: normal
Updated December 8, 2025: We have updated the content and timeline. Thank you for your patience.
[Introduction]
Outlook’s Events from email feature helps users stay organized by automatically adding reservations such as flights, hotels, rental cars, and deliveries to their calendars. To improve reliability and ensure this feature continues to work smoothly, we strongly encourage all providers to adopt Schema.org markup in their transactional emails. This change aligns with industry standards and improves accuracy, consistency, and long-term support.
Until now, Outlook has relied on legacy extraction to support this feature. However:
- Legacy extraction is fragile, and once templates fail, they cannot be fixed.
- We are receiving increasing reports of incorrect or missing events.
- It is technically impossible to make further improvements to the old stack.
- Without migration to Schema.org, the quality and reliability of event extraction will continue to degrade over time.
Screenshot of Settings > Calendar > Events from email
[When this will happen:]
We encourage providers to transition to Schema.org as early as possible, as continued reliance on legacy support is not sustainable. Organizations that do not migrate may experience a gradual decline in the accuracy, reliability, and consistency of automatically generated events. These issues cannot be fixed on the legacy stack, the only long-term solution is migration to Schema.org standards.
[How this affects your organization:]
Who is affected:
- Organizations whose users rely on Outlook’s Events from email feature.
- Partners and providers who send transactional emails (e.g., airlines, hotels, travel agencies, delivery services).
What will happen:
- Emails that continue to rely on legacy extraction may experience increasing failures, missing events, and incorrect calendar entries over time.
- Emails using Schema.org markup will continue to generate calendar events automatically.
- Partners using Schema.org markup report up to 30% higher engagement and more reliable event extraction.
[What you can do to prepare:]
- Identify your Corporate travel partner(s) that are sending booking confirmation emails to your employees and reach out to them for adopting Schema.org support
- To determine whether a provider is using Legacy or Schema.org, you can safely assume most providers are still on Legacy- our data shows that 94% of providers remain on legacy extraction.
- To get more assistance on onboarding a provider to Schema.org, please reach out to [email protected] along with your provider details/contacts and the domains from which these mails are sent, so they can be whitelisted. A detailed onboarding & testing process will be shared.
- Communicate this change to helpdesk staff.
[Compliance considerations]
No compliance considerations identified, review as appropriate for your organization.
