A recent update to the Outlook New app, which is gaining popularity in enterprise environments as an alternative to traditional desktop applications, has led to unexpected issues for some users. According to Sebastian, a reader and IT professional at a Microsoft client company, the app stopped functioning properly following an automatic restart after the update was installed on August 19th, 2025. This malfunction seems to be linked to problems with Visual C++ Runtime (VC-Runtime), specifically referencing issues with ucrtbase.dll in error logs.
Despite attempts by IT staff to revert to a previous version of Outlook New and reinstall VC++ Redist components, the problem persisted. Sebastian expressed hope that Microsoft would address this issue overnight, but no updates were immediately available from the company regarding a fix or workaround for affected users.
Further investigation led to an Eleven-Forum post where another user reported similar issues with the same update (1.2025.813.500). The proposed solution involved navigating to %localappdata%\microsoft in File Explorer, deleting specific subfolders (Olk and OneAuth), and then reconfiguring the app account upon relaunching Outlook New.
However, this method did not resolve Sebastian’s issue, forcing him to revert back to using traditional Outlook. Additional research uncovered that ucrtbase.dll issues are more commonly associated with classic versions of Outlook as documented by Microsoft in a support article from 2024. Given the nature of the problem, it is uncertain if these solutions will be effective for users experiencing difficulties with the newer app version.
Given the widespread impact on user productivity and the reliance on email communications within organizations, it’s critical to stay informed about such updates and their potential implications before rolling them out in a production environment. Microsoft should prioritize addressing these concerns quickly to minimize disruption and ensure smooth operations for all users dependent upon Outlook New for daily business tasks.
Third-party resources like DrWindows.de have reported on the recent August update of the new Outlook version, highlighting its features while also noting that it was rolled back due to issues like those Sebastian encountered. This underscores the importance of thorough testing before releasing updates and highlights ongoing challenges faced by enterprise users transitioning to modern app-based email solutions.
Additionally, user forums are increasingly becoming valuable resources for troubleshooting such issues, indicating a growing trend in community-driven problem-solving as reliance on software applications intensifies across industries. The interplay between official support channels and grassroots efforts from affected users showcases the need for more agile communication strategies among tech companies and their consumer base.
Third-party Insights on Outlook Update Problems
Similar questions
What is the Outlook New app?
When did the update that caused issues occur?
Who reported the malfunctioning of the app after the update?
What specific error is mentioned in the error logs?
Did reverting to a previous version fix the problem?
Is there an official response from Microsoft about this issue yet?
What solution was suggested on Eleven-Forum?
Was the proposed forum solution effective for Sebastian’s situation?
Are ucrtbase.dll issues common with traditional Outlook versions as well?
Why is it important for Microsoft to address these concerns quickly?