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on January 15, 2026
You may see one of the following errors in a pop-up message on your screen. If you need to increase the number of this limit try the next resolution. This option could be useful if you constantly have to wait for Outlook to rebuild its data file when you restart. Before starting, decide which Outlook version you’re using. Microsoft offers twoversions with different troubleshooting approaches.
Run the classic Outlook advanced diagnostic troubleshooter if you've tried all of the preceding steps and Outlook is still crashing or hanging. This step creates detailed information about your Outlook configuration and provides solutions for any known issues that are detected. It also gives you the option to upload your results to Microsoft so that a support engineer can review them. To sum up, the blog elaborated on all the major reasons for Microsoft Outlook keeps crashing problem. Furthermore, we learned six manual solutions to fix this issue.
There is currently no option to revert to the prior behavior, but we would love to hear your feedback to help us with future designs. To learn more about how to send us feedback, please see How do I give feedback on Microsoft Office. Another options is to use the Filter Email button on the ribbon. You may notice that All, Unread , Mentioned and other sort and filtering options, such as By date, and Newest are missing in Outlook above your email list.
As a result it is imperative that Outlook is installed, and kept up-to-date, on all required devices. Devices without an up-to-date Outlook client may result in an impaired digital experience and should be investigated. Devices with Outlook not installed should also be investigated to ensure that this is not an oversight. The folder may have been deleted or the server where the folder is stored may be unavailable. You don't have appropriate permission to perform this operation. The loading of unregistered MAPI services has been disabled by default to make Outlook more secure.
For more information, go to Add or remove an email alias in Outlook.com. If you can't choose any of the menu options, type inside an email message, calendar event, or contact, Outlook may have frozen. There are three steps you can take to try to get Outlook working again. If you are having problems with Outlook, there are a few things we can help with to get you back to sending and receiving your email.
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 guide to repair Outlook problems at the bottom of the screen to see if another process is running. If so, wait a short time (usually two or three minutes) to see if Outlook starts working again. If you can't choose any of the menu options, type inside an email message, calendar event, or contact, Outlook may have frozen.
Some users may not be able to empty their Deleted Items folder. While we fix the problem, you can send the file as a OneDrive link. We have multiple tools to help you automatically diagnose an issue, troubleshoot, and fix problems with Outlook. You can start Outlook in safe mode, disable your add-ins, and then try to open Outlook normally. If you can't open Outlook, or Outlook disappears or crashes, one of your add-ins may be to blame or you may need to update Outlook. Note that you can quickly tell how your mail is currently sorted, by the presence of a small triangle on the field headers.
This issue has been fixed in the following versions and builds. Please reference Update History for builds by channel, Update history for Microsoft 365 Apps (listed by date). When you open or start a new email, classic Outlook crashes.
The root cause was the deployment of an incorrect campaign data file, which led to false positive campaign detection. We have since reverted to the right data file and the outbound email flow has returned to a normal state. We also released a new rule that corrected the wrong campaign verdict for all impacted customers during the incident. If you're having problems sending or receiving email, read how to Fix Outlook.com email sync issues. If you've successfully sent and received email from classic Outlook before, and now Outlook repeatedly asks you to reenter your password, one of two things may have happened.
These often help resolve issues without the guide to repair Outlook problems need to contact support. To access the calendar shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android. If you've already clicked the Accept button in Outlook 2016, you won't be able to re-accept the invitation from another Outlook application.
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. If you are unable to connect or are prompted for your password repeatedly attempt the following options. After finishing one step, if it does not resolve the issue move on to the next. Not something you want to take on lightly, but sometimes you have to.