1 Outlook performance issues in a Cached Exchange Mode ost or .pst file Outlook Microsoft Learn
Sabina Toothman edited this page 2 weeks ago
This file contains ambiguous Unicode characters!

This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.

Any previously stated causes could be held responsible for the Outlook closes or crashes issue. So, to solve this problem, let's go over the various approaches. Outlook crashes are never good, but you do not have to face them unprepared. Understanding the root causes and using the right tools can make all the difference. While built-in tools like ScanPST offer a basic Safety net, they often fall short when it comes to rectifying deeper file damage. In addition, you can export directly into Office 365 mailboxes after recovery with no middle step required.

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.

Creating a guide to repair Outlook problems new Outlook profile may resolve some performance issues. Items moved into new folders will still be located when searching a mailbox. Outlook forwards meeting invitations to other attendees without anyone actually sending an update or forwarding an invite.

Sometimes, antivirus real-time scanning can slow Outlook down. Configure your antivirus software to exclude Outlook files or processes from real-time scans to avoid interference. 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. You might need to set Windows Update to automatically download and install recommended updates. Installing any important, recommended, and optional updates can often correct problems by replacing out-of-date files and fixing vulnerabilities.

Outlook will detect this and asks if you want to start Outlook in Safe Mode. Select "Update Options" and then choose "Enable Updates". If prompted to allow Outlook to make changes to your computer, select Yes.

If those steps don't work, see Need additional help? There are a number of possible reasons for Outlook to behave this way. We've presented the potential solutions in order from quickest to most time consuming. To manage your mailbox by using the AutoArchive feature, see AutoArchive settings explained. We recommend that you move several items in your larger folders to separate folders, or that you archive those items by using the AutoArchive feature.

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. Note that you can quickly tell how your mail is currently sorted, by the presence of a small triangle on the field headers. 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. Please install the Windows 10 Fall Creators Update to fix this issue. Outlook 2016 freezes when you try to preview an Excel file that's attached to an email.

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 guide to repair 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.

This is one of the classic example where Microsoft rolling out updates that has not been fully tested yet and causing headache for IT professionals. The Microsoft technician was very frank that the new Shared Calendar Improvements are guide to repair Outlook problems a mess right now. We are testing the GPO and intend to roll it out to everyone next week.

To access the filtering options faster, add them to your Quick Access Toolbar. Note that you can quickly tell how your mail is currently sorted, by the presence of a small triangle on the field headers. Another options is to use the Filter Email button on the ribbon. If you're using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and re-install iCloud to resolve this issue. The loading of unregistered MAPI services has been disabled by default to make Outlook more secure. This issue affects all Outlook versions on Windows 7, Windows 8, Windows 10.

Newer Windows updates and builds like Windows 10/11 provide better compatibility with Outlook 2019 and Outlook 365. If your Outlook keeps freezing, despite all your effort, its time to bring in the professionals. If your internet is slow or spotty, Outlook might struggle to sync data.