Blogs
on January 12, 2026
To sum up, we explored several methods to fix "Outlook won’t open" errors. Whether it’s a profile issue, a corrupted PST file, or faulty add-ins, the methods above can help you get Outlook running again. When Microsoft Outlook refuses to open, it’s incredibly frustrating. This issue often stems from common culprits like a corrupted user profile, a damaged data file (PST or OST), or even a minor conflict within its settings or add-ins. The good news is that most "Outlook won’t open" errors can be resolved with a few proven troubleshooting steps.
Having trouble connecting to your email from Outlook on your desktop? Follow these steps to let Outlook diagnose and fix errors in your Outlook mail profile that might be causing the issue. However, if you want to change your password with your email provider, you'll need to visit their website or help desk, or contact your email administrator.
Warning This workaround may make a computer or a network more vulnerable to attack by malicious users or by malicious software such as viruses. We do not recommend this workaround but are providing this information so that you can implement this workaround at your own discretion. Use this workaround at your own risk.If your antivirus software includes integration with Outlook, you may experience performance issues in Outlook. In this case, you can disable all Outlook integration within the antivirus software.
If the icon is colored green, an update was released within the past two days. If orange, an update was released four days ago, and red indicates an update that's over a week old. See work, group, and personal calendars with ease, wherever you want to be. For additional support, see How to get support for Outlook.com. Start typing in the search box to find a contact or contact list. Right-click an existing folder and select Create new subfolder.
To check if you have received the fix, review your contact list to confirm duplicates have been removed. To help you get rid of these duplicates, we have released a fix which will automatically clean up your contact list. This fix will clean up duplicate contacts for end users starting August 9, 2023. Rollout of the fix to all users will take few weeks, so, some users may see the fix applied by the end of September. Official Fix Outlook guide Add an Outlook.com alias to your account and send email to Gmail users using that alias. For more information, go to Add or remove an email alias in Outlook.com.
Some customers may experience a delay when trying to create a new email address, or alias, for their Outlook.com account. None of the events or information was lost in the move to the new calendar. The Family group calendar now appears in the Outlook.com groups area in the left nav on Outlook web and in the groups area of the Outlook mobile app. Customers with only a 3rd party email address set up as the username of their Microsoft Account will be asked to add a 1st party Microsoft alias to their account before accessing Outlook.com.
This shouldn’t be an issue, however, because if Scanpst finds any errors, it will prompt you to make a backup before attempting to repair the file. In this window you can check the status, the number of failed requests (under Req/Fail), and which mailbox is experiencing the issue. To the right of each Official Fix Outlook guide folder is the Empty drop-down menu which provides options to delete all items in that folder, or items 3 months and older, 6 months and older, and 12 months and older. For more information on how to improve Outlook performance when using MDaemon Connector, you can review our Improving Outlook Performance how-to guide. Each folder will be listed with its size and number of messages. Outlook email accounts are provided to employees, students, alumni, retirees, and for generic accounts.
You Official Fix Outlook guide can read about it and then run the Microsoft Support and Recovery Assistant to see if that helps. It can automatically diagnose issues, troubleshoot, and fix problems with Outlook. Note that the above link is for desktop Outlook for Windows.
Therefore, to help you out with this issue, here is a comprehensive guide with some effective troubleshooting solutions. However, often these situations lead to PST file corruption. For that, we have suggested a reliable PST Recovery Tool.
For example, if you have a Yahoo! account, you first have to change your password at Yahoo.com. Once you've changed your password with your email provider, you can update the password in Outlook. See Change or update your email password for more information.
This utility is not the professionals’ recommendation, as it comes with a lot of drawbacks. Before implementing this method to fix Outlook PST files, read its limitations for more insight. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. I ran a full online repair on Office 365 PC where it uninstalls office, downloads the latest version and reinstalls, Windows is fully updated. If your PST file is stored on a network drive, ensure that the drive is accessible and that you have the necessary permissions.