I finished the migration for legacy MFA since 1 months but I still have the problem. If none of that worked, I’d restore the server from backup when it was working and see what happens moving forward. If both of those don’t fix it, I’d run a full maintence cycle on the server.
If the problem doesn't occur after you restart Outlook, one of the add-ins is likely the cause of the problem. Restore the add-ins one at a time until the problem does occur to determine which add-in is causing the problem. Make sure that the latest updates for Outlook are installed. For more information, see How to install the latest applicable updates fix Outlook problems for Microsoft Outlook (US English only). Many of these items can be automatically checked by the Classic Outlook Advanced Diagnostics troubleshooter.
With the window with the Windows Update, you will see all the updates you need to make for your Microsoft fix Outlook problems Office. If you are figuring out how to fix "Outlook Not Opening," you will find several possible solutions. The best part is that you are spoiled for choice because some are quick to implement while others are time-consuming.
The only thing is to know how to overcome them when they arise. Whether it's defective add-ins, frozen Outlook, faulty data files, and many others, you can manage all these problems yourself. Knowing the cause of the problem will help you sort out all the issues related to Outlook opening. Should you decide to remove a profile, back up the data files first. All offline cached content will be deleted when you choose fix Outlook problems Remove. For more information, see Introduction to Outlook Data Files (.pst and .ost).
If Outlook works in Outlook Safe Mode but resetting your dat-files did not help, then the issue is most likely caused by an add-in. When typing, please note the space between outlook.exe and /resetnavpane.If you encounter this issue more often, see this Quick Tip to find a more definitive solution. If Outlook shows an error like "Cannot open attachments", this could be due to unsupported fix Outlook problems file formats, outdated Outlook versions, corrupted attachments, or security restrictions. Please install the latest updates on your phone to resolve the issue. Until you can install the Windows Update fix release, you can set a registry key that will cause Outlook to stop using the local Windows Search service.
If you can't find a dialog box open, move on to the next step. For example, the first time you try to Dismiss All on a list of reminders, Outlook asks you if you're sure you want to do that. If you don't choose an option on that dialog box, Outlook won't let you do anything else. Pressing Alt+Tab will help you switch from window to window and help you see what dialog boxes might be stopping Outlook from responding.
There might also be a visual alert that a message is unread, has an attachment, or is flagged. In the Search box, type the name or email address of a person or a keyword you want to search for, and press Enter or select . This is a lightweight app designed to handle multiple accounts and fairly moderate email use. After you run any troubleshooter, Get Help provides details on any findings and suggestions for possible remedies. If one of these resolves your problem, close the app and continue working.
Most times, this is caused by a corrupted search index, which you can rebuild. Keep in mind this does take a while, and it’s usually best done after the user has left for the day. Sometimes you’ll open Outlook and then for no apparent reason, it will freeze or shut itself down. There are quite a few different causes for this, but one of the most common is a defective add-in. Here’s how to disable add-ins in Outlook even when it keeps crashing.
Outlook may fail to open email due to corrupted Outlook profiles, add-ins, damaged OST/PST files, or outdated software. Antivirus conflicts and system issues can also cause startup errors or loading failures. This startup issue often appears when profiles get corrupted, damaged Outlook fix Outlook problems files, add-ins conflicts with system updates or antivirus. Outlook stores all your email messages, meetings and events, contacts, and tasks in data files.
If you want to learn about printing, see Print attachments received in fix Outlook problems email messages. After you've selected a task, you can use the details pane to do things like add more information, add steps, or mark as important. You can view more than one calendar at a time, add other calendars, choose which calendar to display, and create new calendars.
This goes fix Outlook problems to prove that the problem came from your original Outlook profile. Check the solutions to fix "Outlook not opening" problem and how to avoid "Outlook won't open" again. These troubleshooting techniques apply to Outlook 2016 and 2011 for Mac.
When you know the cause of Outlook is having trouble starting then now the next step is to apply the appropriate fix. Below are several proven methods to resolve Outlook’s trouble issues. After running any of the above processes, make sure you check for updates again to verify that all updates have been installed. Use the Inbox Repair Tool (scanpst.exe) to scan your pst-file for errors. When you use a pst-file, it fix Outlook problems could be that an issue with that pst-file is preventing Outlook from starting correctly. When typing, please note the space between outlook.exe and /safe.For alternative methods of starting Outlook in Safe Mode see this Quick Tip.