This tool is no longer available - it has been removed from the Microsoft download page where it was previously homed. MOSDAL (Microsoft Online Services Diagnostics and Logging) Support Toolkit

Here’s an article that talks more about it: It has to be run on the machine experiencing the issue, but it can be helpful at resolving persistent Outlook problems.

This is yet another troubleshooting tool for Microsoft Outlook. This guided-walk-through describes how to troubleshoot free/busy issues that may occur in a hybrid deployment of an on-premises Microsoft Exchange Server and Microsoft Exchange Online in Office 365: With the new release of Office 365 you can now pull mailflow data down to Excel for analysis. Well now you can simply paste the header into the Message Analyzer and it will tell you where the delay came from. To give them an answer you usually had to look at the message headers which As an administrator you’ve probably had more than one of your users ask why a message took so long to get delivered. One of the coolest new features is the Message Header Analyzer. If you don’t already know about the Remote Connectivity Analyzer, it’s a great tool for troubleshooting many common Exchange issues.

Remote Connectivity Analyzer - now With Message Analyzer While that site has beenĭecommissioned, you can use the links below to test the speed between your location and the datacenters in your region. If you have been on Microsoft Online Services for some time, you might have previously used the site which tested the connection speed and reliability of the connection to the Microsoft Datacenters. This guided walkthrough is intended for Office 365 Administrators to help diagnose Outlook connectivity issues for their users. One of the most common problems is troubleshooting Outlook connectivity to Exchange Online. Office 365 Outlook Connectivity Guided Walkthrough

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