This article describes how to troubleshoot performance issues in Microsoft Outlook. If you implement this workaround, make sure that you follow any appropriate additional steps to help protect the computer. However, before you make these changes, we recommend that you evaluate the risks that are associated with implementing this workaround in your particular environment. You can make these changes to work around a specific problem.
Important This article contains a section that shows how to help lower security settings or how to turn off security features on a computer. Outlook 2016 Outlook 2013 Microsoft Outlook 2010 Outlook for Office 365 Outlook 2019 More.