Read how to Add your Outlook.com account to another mail app. Currently, you can't use Outlook on Windows to edit calendars that are shared with your Outlook.com account, even if you've reconnected your Outlook.com account to Outlook. We're working to make it possible to edit shared calendars in Outlook 2016 for Windows.

VBScript does not run or you receive malicious code warning when using a custom form for Outlook

To learn more about how to share feedback, see How do I give feedback on Microsoft Office. Another options is to use the Filter Email button on the ribbon. Please install the Windows 10 Fall Creators Update to fix this issue.

Outlook Known issues in May 2024 updates

Outlook forwards meeting invitations to other attendees without anyone actually sending an update or forwarding an invite. This happens to accounts that are configured in the iOS Mail app. The issues documented in this section have been reported after installing the recent updates listed below. We're investigating the issues and will update this page when a fix is available. In the meantime, please use the workarounds suggested for each issue. Corrupted or badly set-up Outlook profiles can often cause start-up problems.



Microsoft Outlook is one of the best-known business-class email clients from Microsoft. It is a feature-rich application that allows users to manage multiple email accounts, calendars, contacts, and tasks. Outlook also offers several advanced features, like email tracking, read receipts, and email templates, making it a powerful tool for managing email-based workflows. However, sometimes, it can experience connectivity issues, especially when using a Microsoft 365 account.

Outlook known issues in the Nov 2017 updates

Outlook 2016 freezes when you try to preview an Excel file that's attached to an email. For more information about when builds are available for their respective channels, go to Update history for Microsoft 365. We're investigating the issue and will update this page when a fix is available. MAPI does not validate that a provider's DLL that it is requested to recreate Outlook profile step by step load is registered correctly in MapiSVC.inf or even that it comes from the local machine. This can be exploited by creating a file together with an OLE object in such a way to cause MAPI to load a DLL from a network share when the OLE object is activated.

Outlook 2007 and Outlook 2010 display wrong languages

Understanding the root causes and using the right tools can make all the difference. While built-in tools like ScanPST offer a basic Safety net, they often fall short when it comes to rectifying deeper file damage. Faulty hard drives or disk errors can corrupt the Outlook data stored locally. This creates crashes that seem random—until you dig into the hardware logs.

Outlook known issues in the July 2019 updates

• This occurs because custom form script is now disabled by default.
• After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface.
• The built-in search will display the message below to indicate it is not using the Windows Search service.
• Whether it’s restoring email from encrypted backups or recovering badly broken PSTs, Stellar gets the job done with minimal fuss.
• It is a feature-rich application that allows users to manage multiple email accounts, calendars, contacts, and tasks.

Please see the ALTERNATIVE WORKAROUND section below. This occurs because custom form script is now disabled by default. Outlook crashes are never good, but you do not have to face them unprepared.



This can allow arbitrary code execution to occur. If you're using Outlook 2010, Outlook 2013 or Outlook 2016, Outlook data file cannot be accessed uninstall and re-install iCloud to resolve this issue. For more information, please see Outlook email setup. After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface.

Outlook Known issues in March 2023 updates

The app might refuse to launch or crash at the splash screen. Once PSTs start climbing past 2 GB, things get shaky. Outlook slows down, crashes randomly, or fails to load entirely. Users often turn to Microsoft’s ScanPST tool, but it struggles with large files and doesn’t always finish the job. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar Exchange connectivity diagnostic for Windows 10, or use a mobile device.

Let’s see how to fix Outlook connection problems in Microsoft 365 accounts. The file react-native-win32.dll was reported as not found in the specified path, even though the file exists. Robert suspected that it might be related to an Edge update, and replacing the .dll with an older version or downgrading Microsoft 365 to an older build fixed the problem.