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Opened Nov 09, 2025 by Faustino Lowell@faustinolowell
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5 Common Outlook Issues and Troubleshooting Tips

Both services offer robust features and are continually updated to enhance user experience and security. Outlook support for Mac refers to the resources and assistance Microsoft provides for users encountering problems with the Outlook application for macOS (Apple computers). Outlook webmail support is the assistance Microsoft provides for users who encounter problems using Outlook.com (formerly Hotmail) – the web-based version of Outlook accessed through a web browser. Outlook Inbox Support is designed to ensure users can manage their email communication effectively, leveraging Outlook’s features to enhance productivity and maintain organization within their inbox.

Use the classic Outlook startup troubleshooter to diagnose and fix several common classic Outlook for Windows issues for you. Uninstalling office leaves behind a lot of junk, the recovery and support tool will scour it. 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. Virus scanners which integrate themselves with Outlook are known to cause a lot of issues.

When this registry key is set, Outlook will use its own built-in search engine. The built-in search will display the message below to indicate it is not using the Windows Search service. The issues documented in this section have been reported after installing the recent updates listed below.

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.

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. After updating Office, you may experience a brief flashing window every hour, which triggers the OfficeBackgroundHandlerRegistration task to start homepage running. For more information about when builds are available for their respective channels, go to Update history for Microsoft 365.

New features like Files and attachment previews let you see your pictures and files without leaving your inbox. And now you can add emojis and GIFs to your messages. Microsoft is committed to providing a high homepage level of support for all its services, including Outlook.com, ensuring users can manage their accounts effectively and enjoy a seamless email experience.

For each message, you can delete it, mark it as unread, flag the message, or pin it to keep it at the top of your folder. There might also be a visual alert that a message is unread, has an attachment, or is flagged. See Working with message folders in Outlook.com to learn more about available folders. To show or hide the Folders list, select Show or Hide the navigation pane. Calendar events can be used for your own personal event, or you can invite others to create an in-person or Teams meeting.

Pressing Alt+Tab will help you switch from window to window and help you see what dialog boxes might be stopping Outlook from responding. You can read how to fix your Outlook problem on the internet, but sometimes the suggestions don’t work for your specific case. So, we have produced this list of general things to try to resolve your problem in Outlook. Read on to find out how to fix common Outlook problems below. On June 25th, 2019, the Outlook Team made a change to the service to fix this issue. If you are still seeing this issue, restart Outlook a couple of times so it can pick up the service change.

Errors in Microsoft 365 files are homepage 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.

The default SMTP port (25) may be blocked by some Internet Service Providers (ISPs) due to spam concerns. Currently, you can't use Outlook on Windows to edit calendars that are shared with your Outlook.com homepage account, even if you've reconnected your Outlook.com account to Outlook. We're working to make it possible to edit shared calendars in Outlook 2016 for Windows. If you are having issues sending email, this might be due to validation issues with your Microsoft Account.

Sometimes you’ll open Outlook and then for no apparent reason, it will freeze or shut itself down. There are quite homepage 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. Customers using the contact support buttons at the foot of the support pages, or the "email us" links in support Virtual Agent, are unable to open the Help Pane.

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Reference: faustinolowell/8820448#16