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  • Juliann Bold
  • steps-to-fix-outlook-not-opening6369
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Issue created Oct 29, 2025 by Juliann Bold@juliannv099604Owner

Fixes or workarounds for recent issues on Outlook com

I have been using the New Outlook app for a few months now, no issues. I am able to open the older Outlook app, but easy fixes for Outlook errors cannot access the new app. I have restarted my laptop multiple times and tried to Uninstall the New Outlook but to no avail. So, there are several factors that cause the Outlook web access issue.

It could be an issue with a setting on the account, or it could be something external that is blocking normal functions in Outlook. If you're entering a password you know is correct and getting a message that says "incorrect password," then you'll want to read this page. The Authenticator app is designed to help you quickly and safely confirm your identity. With the app, an online intruder would be stuck on the first step of verification, because the Authenticator app is awaiting a one-time passcode, easy fixes for Outlook errors your fingerprint, another password, etc. The AppData folder hosts a lot of files, including bookmarks and cached pages. This might be slowing down or overriding other commands in Outlook.

If you're having problems sending or receiving email, read how to Fix Outlook.com email sync issues. The maximum number of recipients for an individual email through USNH IT mail servers is 300. If you try to send to more than 300 recipients in a single send, you will get an error similar to "This message wasn't delivered to anyone because there are too many recipients. The limit is 300." No matter how well written add-ins are (and even Outlook itself), there will always be the occasional Outlook problem that doesn’t seem to go away or may not be related to add-ins at all. You can read how to fix your Outlook problem on the internet, but sometimes the suggestions don’t work for your specific case.

No action needs to be taken for the fix to be applied. 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 easy fixes for Outlook errors 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.

You can view more than one calendar at a time, add other calendars, choose which calendar to display, and create new calendars. 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. We have recently received some reports of users who are experiencing issues with subscribing to .ics/ical calendars. This fix will also lead to a reduction in the total number of contacts on your contact list. We will ensure that all information is retained and only contacts with matching information in all fields will be cleaned up.

You also can select a day or time slot and create a new appointment or event. Keep track of appointments, meetings, or any other event from anywhere. Add, edit, or delete events using daily, weekly, or monthly views.

Occasionally, classic Outlook tries to run a process in the background. Auto-archive, sending and receiving a very large attachment, or running some of the other mailbox tools can all be done in the background. Check the status bar at the bottom of the screen to see if another process is running.

Use the Microsoft 365 shared computer activation (SCA) troubleshooter to enable shared computer activation for Microsoft 365 applications. Use the uninstall troubleshooter to uninstall Microsoft 365, Office 2021, Office 2019, or Office 2016 from your Windows PC. If you have Outlook in your startup folder, remove the shortcut from the startup folder. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. TrustedTech delivers unbeatable customer service, with experts in licensing and high-level technicians always on-call to answer your tech issues in-depth. Our Account Managers and Distribution Team fulfills orders quickly and efficiently, giving our customers digital downloads in record time so they can move on to their next big project.

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.

In the Folder Pane, you might see a folder named Recovered Personal Folders that contains your default Outlook folders or a Lost and Found folder. Although the repair process might recreate some of the folders, they may be empty. The Lost and Found folder contains any folders and items easy fixes for Outlook errors recovered by the repair tool that Outlook can't place in their original structure. We've streamlined search to make it easier than ever to find what you're looking for. The new Outlook Attachment Preview feature lets you see your pictures and files without leaving your inbox.

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