Microsoft is finally addressing one of the most common complaints about New Outlook on Windows: notification spam. The company confirmed that a new feature will group multiple incoming email alerts into a single notification, reducing interruptions. However, while this change improves focus, it does not solve a persistent performance issue where New Outlook lags behind the legacy Classic client when opening emails from those notifications.
How grouped notifications work
Microsoft began testing this feature in early June, with a rollout scheduled to start in late June and reach all users by mid-September. The system will automatically enable notification grouping by default. When multiple emails arrive within seconds of each other—common during sign-ups or order confirmations—you will receive one consolidated alert instead of a barrage.
Clicking this grouped notification opens the most recent email in your inbox. You can then view the other messages in that batch directly from the inbox view. If you prefer individual alerts for every message, you can disable the feature by navigating to Settings > General > Notifications > Email and toggling off ‘Group notifications.’
This update applies to both Outlook on the web and the New Outlook desktop app for Windows. Microsoft states that the goal is to reduce notification fatigue and improve productivity by minimizing distractions. The feature aims to make the experience cleaner without requiring manual configuration from most users.
The speed gap remains
While grouping notifications addresses volume, it does not fix latency. Independent testing reveals a significant performance disparity between New Outlook and Outlook Classic (the Win32 application). When clicking an email notification in the Windows Notification Center, New Outlook can take between 10 and 30 seconds to open the message.
In contrast, Outlook Classic typically opens the same email within one or two seconds. This delay is noticeable enough that manually opening New Outlook and navigating to the inbox can sometimes be faster than relying on the system notification. The issue appears consistent across Windows 10 and Windows 11 environments.
Beyond speed, reliability remains a concern for some users. Reports indicate that notifications for connected accounts in New Outlook can be inconsistent, with alerts sometimes failing to appear entirely. Microsoft has acknowledged these notification reliability issues and stated it is working on fixes, but no specific timeline has been provided for resolving the slow loading times.
What this means for you
If you rely on New Outlook for personal use or light business tasks, the grouped notifications will likely make your desktop experience less intrusive. You will see fewer pop-ups and can batch-process emails more easily. However, if you depend on immediate access to critical messages via notifications, the current latency in New Outlook may still be frustrating.
For enterprise users or those with complex multi-account setups, Outlook Classic remains the more responsive option for real-time notification handling. Microsoft has indicated that it will continue maintaining both clients, so switching back to Classic is still a viable workaround if speed is your priority. Keep an eye on your settings in September when the grouping feature becomes default, and adjust based on your workflow needs.
Source: Windows Latest
Over to you: Will you keep the new grouped notifications enabled, or do you prefer getting an alert for every single email?