MC1226749 – Outlook Web App: OneView and TrueTime features will retire

Product:

Exchange, Microsoft 365 for the web, Outlook, Windows

Platform:

Mac, Online, Web, World tenant

Status:

Change type:

User impact, Retirement

Links:

Details:

Summary:
OneView and TrueTime features in Outlook Web App will retire between March and June 2026, removing personal account connections and combined calendar views. Users must manually manage calendars afterward. No admin action is needed, but users should be informed and directed to Outlook desktop apps for multi-account support.

Details:
[Introduction]
We're retiring the OneView and TrueTime features from Outlook Web App (OWA). OneView allows users to connect personal email accounts-such as Outlook.com, Gmail, or other IMAP accounts-to their work mailbox in OWA, providing a unified view of multiple inboxes. TrueTime allows users to view personal and work calendars together in OWA for consolidated scheduling. Once these features are retired, users will no longer be able to connect personal accounts or view personal calendar information inside OWA.
[When this will happen:]
This retirement will begin in early March 2026 and complete by late June 2026.

Change Category:
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Scope:
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Release Phase:

Created:
2026-02-04

updated:
2026-02-04

Task Type

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Docu to Check

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MS How does it affect me

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MS Preperations

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MS Urgency

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MS workload name

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summary for non-techies**

The OneView and TrueTime features in the Outlook Web App will be retired between March and June 2026, requiring users to manage their email accounts and calendars separately, though they can still use Outlook desktop apps for multiple account management.

Direct effects for Operations**

Loss of Unified Inbox
Users will no longer have a unified view of personal and work emails, leading to potential missed communications and increased time spent managing multiple accounts separately.
   - roles: End Users, IT Support
   - references: https://techcommunity.microsoft.com/t5/outlook-blog/outlook-web-app-oneview-and-truetime-features-will-retire/ba-p/3701230

Manual Calendar Management
Users will need to manually manage and schedule events across different calendars, increasing the likelihood of scheduling conflicts and missed appointments.
   - roles: End Users, Project Managers
   - references: https://techcommunity.microsoft.com/t5/outlook-blog/outlook-web-app-oneview-and-truetime-features-will-retire/ba-p/3701230

Increased User Frustration
The removal of features may lead to user frustration and dissatisfaction, impacting overall productivity and morale.
   - roles: End Users, Team Leaders
   - references: https://techcommunity.microsoft.com/t5/outlook-blog/outlook-web-app-oneview-and-truetime-features-will-retire/ba-p/3701230

Need for Training on Alternatives
Users will require training and guidance on using Outlook desktop apps for multi-account support, which may not be readily available, leading to a learning curve.
   - roles: End Users, Training Coordinators
   - references: https://techcommunity.microsoft.com/t5/outlook-blog/outlook-web-app-oneview-and-truetime-features-will-retire/ba-p/3701230

Documentation Updates
Internal helpdesk guidance and documentation will need to be updated to reflect the changes, requiring additional resources and time.
   - roles: IT Support, Documentation Specialists
   - references: https://techcommunity.microsoft.com/t5/outlook-blog/outlook-web-app-oneview-and-truetime-features-will-retire/ba-p/3701230

Configutation Options**

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Potentional Risks**

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IT Security**

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explanation for non-techies**

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