Learn How to Tackle New Outlook High Memory Usage Issue
Published: August 5th, 2025 • 5 Min Read
In the ever-changing world of email clients, Microsoft Outlook has been a constant factor in a user’s professional life. For many years, users have utilized Outlook Classic, a traditional desktop application renowned for its features, professional tools, and offline capabilities.
However, with Microsoft outlining a phased End of Life (EOL) for Outlook Classic by Q2 of 2029, users are now slowly being transitioned to the new Outlook. The New Outlook was targeted to bring opportunities such as an improved security system and cloud integration, but it introduced new technical drawbacks, like New Outlook high memory restart.
In this blog, we will explore the roles of Outlook Classic, issues, and advantages of New Outlook, and comparison of memory usage between Outlook (Classic) and New Outlook. Additionally, we will also discuss how users can effectively find tips for Microsoft Outlook high RAM usage, and more.
Understanding the True Veteran – Outlook Classic
The Outlook (Classic) version is a conventional desktop application that has been accompanying Microsoft since 1997, providing not only the feature of managing emails but also modern rules, VBA scripting, plugin support, extensive contact, calendar, and organization tools for tasks. The tool soon became a reliable and familiar option among users, making it a preferred choice. However, as time changed, the Classic version began to have its demerits, creating technical challenges among the users.
| Benefits | Drawbacks |
| Offers features like calendar, email, tasks, contacts, journals, notes, and more | Older versions consist disorganized profiles leading to high memory usage and slow performance |
| Gives offline access to mailboxes via PST/OST files | Requires regular system updates |
| Users can take advantage of a user-friendly interface | Overwhelming and outdated for new users due to the sheer number of options |
| Enables the option of personalization of views, settings, and rules | Decrease the launch speed as the size of the file increases |
| Offers a consistent experience with the Windows operating system to promote a reliable OS environment | Does not regularly include AI-driven attributes such as meeting insights or suggested replies found in other client-based applications nowadays |
New Outlook for the Modern World
The New Outlook is crafted with a unified user experience, modern aesthetics across Windows and web, and a deeper amalgamation with Microsoft 365. Along with its robust features, one of the pressing issues present for many users who are shifting or already operating on this edition is the New Outlook high memory usage. The problem has been observed by plenty of users on a regular basis through having to experience sluggish response, system getting slowed down, application crashes frequently, and a new Outlook high memory usage restart.
The consistent high memory consumption often drains the system’s resources, affecting the overall productivity. Whether users are dealing with Microsoft Outlook high RAM usage or facing a new Outlook memory usage restart concern where the application lags noticeably. The problem seems to be consistent even when testing on newer devices.
Comparing Outlook Classic and New Outlook High Memory Consumption
The Outlook Classic generally utilizes a moderate amount of RAM, around 200 MB when inactive, known for its stable memory usage. However, it can often become resource-intensive with mailboxes of large sizes or numerous add-ins. The construction of this tool is not heavily reliant on web technologies for RAM usage to sustain at a fairly constant rate.
On the other hand, Users have often reported high memory usage alert while consuming a memory consumption level of around 600-750MB RAM often increasing to sometimes 2 GB, 4GB, and even up to 7GB on the new Outlook desktop application. The New Outlook high memory usage issue arises due to being heavily reliant on WebView2. It is a control that assists in embedding web technologies into the Windows application, requiring more Microsoft Outlook high RAM usage.
Troubleshooting Microsoft Outlook High Memory Usage Consumption
- Users can restart Outlook or their PC as a simple new Outlook memory usage restart purifies the temporary and unnecessary memory bifurcation.
- Make sure no unnecessary applications are running in the background.
- Delete or archive information that is old or no longer needed to properly utilize the mailbox cleanup provided by Outlook
- Properly check internet connectivity as often times Outlook finds it difficult to consume new resources while syncing with a poor network connection.
- Regularly update the operating system as well as the Outlook to Microsoft for a reliable user experience.
A Reliable Solution for Microsoft Outlook High Memory Usage
For users who are migrating from Outlook (Classic) or having performance difficulties due to New Outlook high memory consumption, the BitRecover OST to PST converter provides a bridged solution, allowing users to convert their OST data into PST from outdated Outlook profiles.
The OST to PST converter is designed to convert those files that have become inaccessible or have been orphaned and securely import them into any version of Microsoft Outlook. This data converter is a lifesaver as it ensures all the valuable contacts, emails, tasks, and calendars are saved in a place and are not hampered by any unknown source or connectivity issue.
This advanced software tool recovers data from orphaned, damaged, or corrupted OST files. Moreover, it preserves and sustains the original structure, attachments, and email elements like to, subject, Cc, Bcc, date, etc. This tool provides a reliable solution that enables users to manage their files independently without a hitch.
Conclusion
The New Outlook high memory usage is not just a slight inconvenience but a widespread performance constraint, constantly being disrupted by Outlook high memory usage alert, sudden increase of memory, and restarts. As Microsoft continues to redefine the new Outlook, it is essential for users to keep their important OST files safe. We suggest the users think about backing up or converting their OST files into PST with the purpose to avoid any memory overuse. With our OST to PST converter, users can be ensured that they remain accessible in their digital communication, regardless of the demerits that the evolving software imposes.