Office 365: Outlook and mobile device connectivity troubleshooting resources


This article contains links to technical resources and support information for troubleshooting Microsoft Outlook connectivity and mobile device connectivity in Office 365.

Cannot connect to Exchange Online by using Outlook

Microsoft Knowledge Base articles

  • 2459968 Outlook 2011 for Mac doesn't automatically set up your email server settings for Exchange Online in Office 365

Help articles

Poor performance

Knowledge Base articles

  • 2413813 How to troubleshoot issues in which Outlook 2007 or Outlook 2010 crashes or stops responding (hangs) when it's used with Office 365
  • 2441551 Outlook performance is slow in the Office 365 environment
  • 2646504 How to remove automappping for a shared mailbox in Office 365

Auto Account Setup fails in Office 365

Knowledge Base articles

  • 2404385 Outlook can't set up a new profile by using Exchange Autodiscover for an Exchange Online mailbox in Office 365
  • 2427141 You can't find a user in the offline address book in Office 365
  • 2429946 How to troubleshoot the Outlook Offline Address Book in an Office 365 environment
  • 2710605 "Anonymous authentication enabled for virtual directory" error message when you use the Exchange Analyzer tool to send an anonymous HTTP request from the remote server to the URL in Office 365
  • 2710606 Error message in the Exchange Remote Connectivity Analyzer tool when you test the Outlook Anywhere feature in an Office 365 environment: "Mutual Authentication could not be established"

Repeated password prompts in Outlook

Knowledge Base articles

  • 2466333 Federated users can't connect to an Exchange Online mailbox
  • 2637629 How to troubleshoot non-browser apps that can't sign in to Office 365, Azure, or Intune

Cannot view free/busy information in the Outlook calendar

Knowledge Base articles

  • 2555008 How to troubleshoot free/busy issues in a hybrid deployment of on-premises Exchange Server and Exchange Online in Office 365
  • 2581088 How to troubleshoot issues that prevent a user from viewing other users' free/busy information in Office Outlook 2007 and in Outlook 2010 in an Office 365 environment

Cannot configure mobile devices

Knowledge Base articles

  • 2427193 A mobile device can't connect to Exchange Online by using Exchange ActiveSync
  • 2679626 Your Office 365 email account is not automatically set up on your Google Android device or on your Apple iOS-based device through the Autodiscover service

Tools and Diagnostics wiki articles in the Office 365 Community

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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