Try the methods from the following Microsoft Knowledge Base articles, as appropriate for the version of Outlook that you're running:Ģ652320 'Outlook not responding' error or Outlook freezes when you open a file or send mailĢ695805 How to troubleshoot performance issues in Outlook 2010ĩ40226 How to troubleshoot performance issues in Outlook 2007Ĭlick Outlook Advanced Diagnostics, and then click Run when you are prompted by your browser. Test to learn whether the issue is resolved. For more information, see the following Microsoft Knowledge Base article:Ģ625547 How to install the latest applicable updates for Microsoft Outlook (US English only)

Make sure that the latest updates for Outlook are installed. To troubleshoot this issue, follow these steps: This includes issues that affect your local proxy server, firewall, or Internet service provider. If other customers are experiencing the issue, the issue should end when the service-interrupting event is resolved.Īlso, determine whether any local network issues might be causing the problem. In this case, sign in to the Office 365 portal by using your administrator credentials, and then click service health to determine whether other customers are experiencing the same issue. This issue may be caused by an Exchange Online server issue. Outlook is retrieving information from the server

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