Microsoft Online Services Diagnostics and Logging Support Toolkit

by Arman Obosyan 29. January 2014 17:56

Microsoft Online Services Diagnostics and Logging Support Toolkit (MOSDAL) performs tests and collects data for Online Services Support professionals and IT professionals to troubleshoot Office 365 configuration issues. The tests contains few categories, such as Exchange, Lync, and Applications. The types of information that MOSDAL collects include the following:

  • System configuration information
  • Network configuration information
  • Registry entries pertinent to Office 365
  • Network ports
  • HTTPS requests
  • Information about Office 365 applications; for example, Office Professional Plus Subscription

Running some test, MOSDAL requesting Office 365 logon credentials. Depending on the number of services you selected, MOSDAL might take some time to collect information to be used for troubleshooting.


After it has gathered all the information, you will be provided with the option to open the file location where all the information is exported into organized folders and files. If you run MOSDAL multiple times, the data will be organized in folders with respective timestamps


MOSDAL collects a lot of information, and it is sometimes difficult to locate and interpret the data. From the MOSDAL download site, you should download and read the MOSDAL training manual, which will walk you through the types of data being gathered, where to locate the data, and how the data can be used for troubleshooting purposes.

Download MOSDAL (Microsoft Online Services Diagnostics and Logging) Support Toolkit

MOSDAL x32 (en-us).zip 2.6 MB
MOSDAL x64 (en-us).zip 2.6 MB
MOSDAL 4.6 Training (en-us).zip 504 KB


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About the author

Arman Obosyan have more than 20+ years’ work experience in Information Technologies sector.

Last few years he working on a position Technology Strategist at Microsoft Corporation, In the past Arman was Head of IT Infrastructure in Governmental Central Bank of Georgia (National Bank of Georgia).

Nowadays Arman is supporting C-Level and enabling business, visionary with a passion of technology, trends.


Certified since 2003 year, passed following certifications MCP, MCSA, MCSE, MCTS, MCITP, Exin ITIL and VMware Certified Professional (VCP)

Founder / Lead of Microsoft Certified Professionals (MCP) Club Tbilisi and Community GE project 

In 2010 Was awarded a Microsoft Most Valuable Professional (MVP)

2017 MVP Reconnect


The opinions expressed herein are my own personal opinions and do not represent anyone else's view in any way, including those of my employer.

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