For more information, see How to install the latest applicable updates for Microsoft Outlook (US English only). Make sure that the latest updates for Outlook are installed. 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 Microsoft 365 portal by using your administrator credentials, and then select 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 Frequently, you receive the following warning message: Outlook responds slowly when you try to insert an attachment.When you send an email message, the message sits in the Outbox folder for a long time.Outlook responds slowly when you try to open email messages.When you use Microsoft Outlook together with Microsoft 365, you experience one or more of the following symptoms:
