From b4e7fbce0c518b914e9a0e98c84ec7c3a110d568 Mon Sep 17 00:00:00 2001 From: Raymon Lair Date: Fri, 7 Nov 2025 10:44:07 +0800 Subject: [PATCH] Update 'Outlook performance issues in a Cached Exchange Mode ost or .pst file Outlook Microsoft Learn' --- ...st-or-.pst-file-Outlook-Microsoft-Learn.md | 21 +++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 Outlook-performance-issues-in-a-Cached-Exchange-Mode--ost-or-.pst-file-Outlook-Microsoft-Learn.md diff --git a/Outlook-performance-issues-in-a-Cached-Exchange-Mode--ost-or-.pst-file-Outlook-Microsoft-Learn.md b/Outlook-performance-issues-in-a-Cached-Exchange-Mode--ost-or-.pst-file-Outlook-Microsoft-Learn.md new file mode 100644 index 0000000..4485452 --- /dev/null +++ b/Outlook-performance-issues-in-a-Cached-Exchange-Mode--ost-or-.pst-file-Outlook-Microsoft-Learn.md @@ -0,0 +1,21 @@ +For more information, see Introduction to Outlook Data Files (.pst and .ost). You can determine if it's corrupted by creating a new profile and changing which profile is used when Outlook site starts. If Outlook is NOT able to start in safe mode, then try the next proposed solution below, entitled Create a new Outlook profile. 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. If you are trapped in a similar situation that my Outlook is not opening, you may feel disturbed about the problem. In the following post, you will find out solutions for the common Outlook not opening problems bonus tips to prevent the problem from happening again. + +A vast community of Microsoft Office365 users that are working together to support the product and others. Simran Bhatia is a technical content writer engaged in writing clear, concise, and SEO-optimized content. With a background in computer science and a passion for writing, I thrive to deliver complex technical content in simple layman terms. This method using the SCANPST.EXE will not work if the PST Files are in bulk or they are encrypted. + +Although add-ins can enhance your user experience, they can occasionally interfere or conflict with Outlook. Make sure that the latest updates for Outlook are installed. For more information, see How to install the latest applicable updates for Microsoft Outlook (US English only). + +Add-ins are extensions that you can install to enhance Outlook’s functionality and unlock additional features, like CRM integration. But these add-ins can sometimes result in compatibility issues, especially if they’re not up-to-date or poorly coded. A conflicting add-in might cause Outlook to freeze, crash, or not open at all. + +Performance may be decreased if you use the Outlook AutoArchive feature or sync to Outlook with a mobile device. These processes can use a large number of resources. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. If Outlook keeps crashing, you can run the site Outlook Diagnostics Tool to scan and fix common issues related to Outlook. Close Outlook and press Window logo + R keys to open a Run dialog box. Select the Include items with the "Do not Auto Archive" checkbox and click ok. + +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. + +Bug fixes, new features, and performance enhancements are released regularly. If you try to delete or move a large number of messages at once, Outlook can appear to freeze, but really, it's working behind the scenes. Check the status bar at the bottom of the screen. If Outlook is performing some operation on hundreds or thousands of messages at once, it might appear to be stuck. Give Outlook a few minutes to finish the process and it should start to work again. To determine whether this problem is caused by a corrupted user profile, create a user profile to see whether the problem still occurs when you use the new profile. + +If any of these components are missing or corrupted during installation, Outlook may fail to open or could crash unexpectedly. Maybe you've added a new program to your computer that doesn't get along with Outlook, or your system has a virus. Regardless site of the specific cause, there are several key troubleshooting fixes to try that might help. If it starts without any problems, you can check the add-ins. Moreover, it will help you to get the answer to which add-in is causing the issue. + +If Outlook is still not working correctly even after restarting it, then you could try repairing the program and restart your computer afterward. Outlook is one of the most complex applications of the Microsoft Office suite, which makes it extremely resource-hungry. Outlook may hang site simply because it does not have enough memory to run or perform a required operation. This is often the case with outdated and low capacity PCs, however even modern and powerful ones cannot feel secured against this. + +If you close outlook(make sure its not in the system tray) then click on start and type Domain, then find Access work or school. You should see the Microsoft account, click on [site](https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide/) it and disconnect it. I'm having an issue with one Outlook 365, the program open and get stuck at loading the user profile, any profiles. I decided to try and fix it by uninstalling and reinstalling. I also removed some old add-ins and an old, inactive account (but Outlook worked no problem with these for a long time). + +Be aware that if you are connecting to an Exchange Server mailbox, your mailbox or your email messages are already being scanned by antivirus software on the server. For more information, see You may experience application pauses if you have a large Outlook data file. Optionally, if you have a Microsoft Exchange online archive, you can move items to that archive or create retention policies to automatically dispose of older items. \ No newline at end of file