However, you can repair the Outlook data file (PST) using ScanPST.exe, also known as the Inbox Repair Tool. You can follow the below solutions to troubleshoot and resolve the Outlook running slow issue. This guide highlights the causes behind these issues and lists troubleshooting methods to resolve the "Outlook is running slow on Windows system" issue. If you are using an Exchange account in Cached mode, compacting your OST file may help improve performance.

It worked well and was fairly light-weight on system resources. Microsoft bought the company that made it and the product is no longer officially offered. However, you might still be able to find a download somewhere on the Internet. We love reading your suggestions on visit Fix Outlook Site new features and feedback about how you use our products! To learn more about how to share feedback, see How do I give feedback on Microsoft Office. 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.

If you have Outlook in your startup folder, remove the shortcut from the startup folder. To learn more about how to share your feedback, see How do I give feedback on Microsoft Office. Some users may not be able to empty their Deleted Items folder. While we fix the problem, visit Fix Outlook Site 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.

In this case, you’ll have to remove your app’s cache to resolve your issue. Should you decide to remove a profile, back up the data files first. All offline cached content will be deleted when you choose Remove. For more information, see Introduction to Outlook Data Files (.pst and .ost). If your issue with Outlook persists, use the repair tool’s "Online Repair" option to fix your app problems. This option takes longer than the first one and requires an active internet connection to resolve your app issues.

The person who sent you the invitation will need to remove your permissions and then send a new invitation. 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. Outlook supports sending from a secondary connected account for Microsoft owned domains such as @outlook.com, @live.com, @hotmail.com but has not implemented this functionality for third-party domains. If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account. If you typically use an Outlook.com account for email, this issue can occur if there are multiple aliases on the account and the 3rd party email address visit Fix Outlook Site is the primary alias.

Warning This workaround may make a computer or a network more vulnerable to attack by malicious users or by malicious software such as viruses. We do not recommend this workaround but are providing this information so that you can implement this workaround at your own discretion. Use this workaround at your own risk.If your antivirus software includes integration with Outlook, you may experience performance issues in Outlook. In this case, you can disable all Outlook integration within the antivirus software. Or, you can disable any antivirus software add-ins that are installed in Outlook.

So you should be able to find some help on this forum. But it may take a while before someone answers your visit Fix Outlook Site questions. To update your password in Outlook, see Change or update your email password. If you're having problems setting up your email in classic Outlook, we want to help.

In some scenarios, doing so fixes the "Outlook will not open" issue. However, if installing updates doesn’t fix the problem, then try to repair your Office programs. Then, you can try to start Outlook 2016 in Safe Mode and then check which add-in is causing Outlook issues, disabling that add-in.

When you have a weak or unstable internet connection, it can cause the app to load slowly, especially on mobile devices. If you’re using an outdated version of Outlook, it can result in slower performance due to a lack of necessary updates and improvements. If a specific version significantly impacts performance, such as CPU you could navigate to the "High CPU usage" diagnostics dashboard and look for the Outlook binary. Some of these data-gathering remote actions are used to populate the live dashboard and should already be scheduled. You can query the results by investigating KPIs from the Live dashboard or from your own investigations. Restart Outlook and check the performance of the Outlook application.

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. For more information about when builds are available for their respective channels, go to Update history for Microsoft 365. MAPI does not validate that a provider's DLL that it is requested to load is registered correctly in MapiSVC.inf or even that it comes from the local machine. This can be exploited by creating a file together with an OLE object in such a way to cause MAPI to load a DLL from a visit Fix Outlook Site network share when the OLE object is activated.