Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. You can start Outlook in safe mode, disable your add-ins, and then try to open Outlook normally. Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. For a short intro about how to access and read the Event Viewer in Windows, see this Quick Tip. If these methods dose not work, you can also try a third party tool, Kernel for Outlook PST Repair tool. If anyone finds a more permanent solution, I would appreciate it.

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 cannot access the new app. I have restarted my laptop multiple times and tried to Uninstall the New Outlook but to no avail.

The good news is that most "Outlook won’t open" errors can be resolved with a few proven troubleshooting steps. If the above Fix Outlook Site steps, especially ScanPST.exe, fail to resolve the "Outlook won’t open" error, your Outlook data file is likely severely corrupted or extensively damaged. In such critical situations, a specialized and reliable professional tool like the Aryson Outlook PST Repair Tool becomes the best solution. Yes, you can often fix Outlook without reinstalling Office.

Occasionally, that profile can become corrupted. You can determine if it's corrupted by creating a new profile and changing which profile is used when Outlook starts. Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. Use the classic Outlook startup troubleshooter to diagnose and fix several common classic Outlook for Windows issues for you. Hello, despite my new attempts with 80 users, I am resetting the registry keys for 3 to 4 users per day… Have you found a solution?

Find solutions to common problems or get help from Fix Outlook Site a support agent. If Outlook is NOT able to start in safe mode, then try the next proposed solution below, entitled Create a new Outlook profile. Outlook may be running with settings meant for an older Windows version. For more detailed instruction on how to enable or disable add-ins see this Quick Tip.If you you get an error that you cannot disable the add-in see this Quick Tip instead. The "Cannot open the Outlook window" error can be fixed quite easily. If you share this computer with another user, you can ask this other user to logon and ask to verify if Outlook is still working for him or her.

Microsoft says Office users may experience problems launching Outlook and other apps on Windows 10 and 11 due to conflicts with antivirus software after installing the latest Patch Tuesday update. I did every solution what was written in this community, but this didn't resolve my issue. A Fix Outlook Site vast community of Microsoft Office365 users that are working together to support the product and others. Then, each item in your calendar folder is checked for known problems that can cause unexpected behavior, such as meetings that seem to be missing.

If creating a new profile solves your issue, you can return to the Show Profiles dialog and delete your old profile. If you have Outlook in your startup folder, remove the shortcut from the startup folder. Sometimes outdated or over-protective anti-virus / anti-spam programs can conflict with Outlook or with one of your Outlook add-ins. As a result, the Fix Outlook Site anti-virus blocks the add-in and prevents Outlook from functioning properly.

If Outlook is NOT able to start in safe mode, then try the next proposed solution below, entitled Create a new Outlook profile. Despite the various avenues mentioned, the problem is identified only on RDS 2016 Fix Outlook Site (5 servers) with Office 2016. Curiously, there are no issues with PCs running Windows 10 or 11 and Outlook 2016, all within the AD. I initially had a script to remove the entire Outlook folder if date created was before the date of implementation. I’ve modified this to remove the above autodiscover records on user login as a temp workaround.

Uninstalling this part of your virus scanner is strongly advised