This feature isn't available for Microsoft 365 Government, Microsoft 365 operated by 21Vianet, or Microsoft 365 Germany.The Outlook Web App (OWA) lets you access your Office 365 mailbox using a web browser from any computer that has an Internet connection.

This feature requires a Microsoft 365 administrator account. Select Run Tests: Outlook User Connectivity to download and run the diagnostic. The diagnostics perform automated checks to detect issues and provide possible solutions to fix them. There are Microsoft diagnostics that you can run to troubleshoot connectivity issues. For Windows Update instructions, see Windows Update: FAQ. Run Windows Update to make sure that you have the latest updates for Outlook and other desktop applications for Microsoft 365. If your Outlook client software or Windows operating system software is out of date, you might have problems sending and receiving email. If you're an admin with multiple users reporting problems, you also should check for service issues with Microsoft 365. Out-of-date software and corrupted Outlook profiles are two of the most common issues that can prevent you from sending and receiving email. Need more help? Contact support for business products - Admin Help Let us fix your issue Support and Recovery Assistant for Microsoft 365 If our automated tool can't fix your issue, or you'd like to fix it yourself, see the next section. We can diagnose and fix several common Outlook connectivity issues for you.

Let us fix your Outlook connection problems for you If you're looking for help with Outlook for Mac, check Outlook for Mac Help. If you're looking for help with, check Get help with.

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