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Add How to troubleshoot performance issues in Outlook

Jermaine Haynes 2026-01-02 09:17:10 +08:00
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Select More to see additional actions—for example, an option to print a message. If you want to learn about printing, see Print attachments received in email messages. Having trouble connecting to your email from Outlook on your desktop? Follow these steps to let Outlook diagnose and fix errors in your Outlook mail profile that might be causing the issue. We have recently received some reports of users who are experiencing issues with subscribing to .ics/ical calendars. We're aware of an issue where some users see the error message "Your message can't be displayed right now".
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).
In the meantime, please use the workarounds suggested for each issue. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. Read how to Add your Outlook.com account to another mail app. This occurs because custom form script is now disabled by default. To determine the cause of the performance issues, start the Assistant, and run the Outlook Diagnostic in the Advanced Diagnostics section. Serious problems might occur if you modify the registry incorrectly.
Errors in Microsoft 365 files are step-by-step Outlook troubleshooting repaired automatically. To start Outlook in safe mode, click on its icon holding the Ctrl key, or enter outlook.exe /safe in the Run dialog box. You'll see a message asking you to confirm that you really want to start Outlook in Safe mode, click Yes. If you have email messages in an email program, you must import your email messages and addresses to the new user profile before you delete the old profile. If everything is working correctly, you can now delete the old profile. I have found that when this happens its due to the Account in windows needing to be updated.
We're investigating the issue and will update this page when a fix is available. If you're using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and re-install iCloud to resolve this issue. This issue affects all Outlook versions on Windows 7, Windows 8, Windows 10. A lot of times, a user will click on something by accident and change their view and be unsure of how to get it back. If anyone finds a more permanent solution, I would appreciate it. It seems like something went wrong on Microsoft update and they might recall it or fix it, so we might need to wait untill that.
You don't have appropriate permission to perform this operation. Outlook 2016 freezes when you try to preview an Excel file that's attached to an email. This issue affects all Outlook versions on Windows 7, Windows 8, Windows 10. After installing the September Public Update, Outlook 2007 displays step-by-step Outlook troubleshooting mixed languages in the user interface. We have multiple tools to help you automatically diagnose an issue, troubleshoot, and fix problems with Outlook.
If Outlook is configured to connect to the Exchange mailbox in Online mode, an .ost file is not used. To adjust the number of days of data that are synced for shared folders, add the following registry values. You can limit the synchronization window that’s used for calendar folders to reduce the number of items that are stored locally in your calendar folders.
Get Help has troubleshooters for [step-by-step Outlook troubleshooting](https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide/) classic Outlook for Windows you can run for many common scenarios, such as Outlook startup or profile setup problems. These often help resolve issues without the need to contact support. The issues documented in this section have been reported after installing the recent updates listed below. We're investigating the issues and will update this page when a fix is available.
If a troubleshooter is available for your issue, select Start to run that troubleshooter. Not something you want to take on lightly, but sometimes you have to. Be aware that you may need your product key if you received one. You can read how to fix your Outlook problem on the internet, but sometimes the suggestions don’t work for your specific case.
To effortlessly change your settings so that your inbox looks the way you want it to, see Personalize your new Mail experience in Outlook.com. 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. The person who sent you the invitation will need to remove your permissions and then send a new invitation. You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile.
Installing any important, recommended, and optional updates can often correct problems by replacing out-of-date files and fixing vulnerabilities. To install the latest Windows and Office updates, click the link below. Please install the latest updates on your phone to resolve the issue. Outlook forwards meeting invitations to other attendees without anyone actually sending an update or forwarding an invite. This happens to accounts that are configured in the iOS Mail app. 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.