With the release of the Microsoft Online Services Diagnostics and Logging Support Toolkit 4.6, we introduce a number of exciting new features and improve the user experience yet again so both users (information workers) and administrators can collect the right data, for the right problem.  In this release, we made an effort to make the tool and its output, more user friendly.  Not only did we make improvements to the UI to help guide users through the data collection process, we made many of the reports that MOSDAL generates more readable.  Please read below for additional details on all the improvements MOSDAL 4.6 has to offer:

  • User Interface Changes – Added information to help users collect the right data, as well as understand what data MOSDAL is collecting.
  • New Languages – MOSDAL is now offered in Russian and Korean languages.
  • Smaller download – MOSDAL will only download .NET 4.0 and Windows Installer 3.0 if they are not present on the system.  This reduces the size of the installation package by more than half.
  • Exchange ActiveSync diagnostics – In addition to testing the Exchange Autodiscover process, MOSDAL now also performs ActiveSync connectivity tests.  The tests are run sequentially, and the results are now viewable in a web format that is similar to
  • Compatibility with Microsoft Office 2013 and Microsoft Office Click-To-Run – MOSDAL is now aware of and will collect data for Outlook 2013 and Lync 2013.  In addition, if you installed Office 2013 through Click-To-Run, MOSDAL will collect additional data to help troubleshoot Click-to-Run installation and activation issues.
  • Compatibility with Microsoft Windows 8, Windows Server 2012 and .NET 4.5 – MOSDAL will now run without issues on Microsoft Windows 8, Windows Server 2012 and on systems with .NET 4.5 installed.
  • WebDAV ETL component logging for SharePoint Online – Logs are collected by MOSDAL to help troubleshoot issues WebDAV connections to SharePoint Online.
  • Directory Synchronization, Domains/DNS and Exchange Hybrid Configuration reports in XML – Many of the reports generated by MOSDAL are now in XML format to make them easier to read and easier to create automated diagnostics to help identify issues quicker.
  • Windows Network Trace logging – Network tracing utilizes the Event Tracing for Windows (ETW) framework available in Windows. Network components (such as Winsock, TCP/IP, NDIS, packet-capture, and so on) register as ETW trace providers and emit events related to network activity. Any recordable activity of significance can be an event logged to ETW. Tracing for these network components and packet captures can be enabled using the netsh trace context which acts as an ETW controller.  For more information, see


Here are some resources to get started with MOSDAL 4.6:

Here are some additional resources where you can see the tool in action:

Exchange Online:

  • 2555008 How to troubleshoot free/busy issues when you use Exchange Federation in the Microsoft Office 365 for enterprises environment
  • 2581088 How to troubleshoot issues that prevent you from viewing other clients' free/busy information in Office Outlook 2007 and in Outlook 2010 in an Office 365 environment
  • VIDEO:  Troubleshooting Issues with Free/Busy Information in Office Outlook Clients for Office 365

Lync Online:

  • 2566790 Automatic sign-in, domain federation, and other features do not work as expected in Lync Online when you use a custom domain in Office 365Automatic sign-in, domain federation, and other features do not work as expected in Lync Online when you use a custom domain in Office 365
  • 2541980 How to troubleshoot authentication and connectivity issues in Lync Online
  • 2392146 Instant messages to federated Lync contacts fail
  • VIDEO:  Troubleshooting Sign-In Issues in Lync Online for Office 365
  • VIDEO:  Troubleshooting Instant Message Failures to Federated Contcacts in Lync Online for Office 365
  • VIDEO:  Troubleshooting “Cannot Connect to the Server” error when using Lync Mobile for Office 365

Office 365 Suite:

  • 2515404 Troubleshoot domain verification issues in Office 365
  • 2621267 How to view and verify CNAME records, MX records, TXT records and SRV records in Office 365
  • VIDEO:  Troubleshooting Domain Verification Errors in Office 365

Identity federation/Single Sign On:

  • 2598459 How to use the Microsoft Online Services Diagnostics and Logging (MOSDAL) Support Toolkit to diagnose identity federation issues in Office 365
  • 2433327 How to use MOSDAL to enable tracing for the Microsoft Online Services Sign-in Assistant to troubleshoot rich client authentication issues
  • VIDEO:  How to Use MOSDAL to Diagnose Identity Federation Issues in Office 365

Directory Synchronization (Co-Existence):

  • 2643629 Individual Active Directory Domain Services objects do not synchronize to Office 365
  • 2647098 Duplicate or invalid attributes prevent Office 365 directory synchronization
  • VIDEO:  Troubleshooting Duplicate or Invalid User Attributes that Prevent Directory Synchronization in Office 365

SharePoint Online:

  • 2629108 How to use the "Open with Explorer" command and how to troubleshoot issues with this option in SharePoint Online for Office 365

Visit the MOSDAL wiki page for more information.