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By Chris De Herrera 
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ActiveSync 4.x Troubleshooting Guide - Logs & Services
By Chris De Herrera, Copyright 2005
 Version 1.00  Revised 12/19/2005

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    1. Installation

    2. Initial Configuration

    3. USB Issues

    4. Guest Issues

    5. Firewall and Proxy Issues

    6. Outlook Errors

    7. Synchronization Errors

    8. Mobile Information Server / Outlook Mobile Access

    9. Exchange ActiveSync Error Codes and Solutions

    10. Missing Calendar, Contacts or Tasks Items

    11. Security Advisories

    12. ActiveSync 4.x Troubleshooting Guide - General

    13. ActiveSync 4.x Troubleshooting Guide - Limitations

    14. ActiveSync 4.x Troubleshooting Guide - 85010014

    15. ActiveSync 4.x Troubleshooting Guide - Firewall, VPN, Proxy

    16. ActiveSync 4.x Troubleshooting Guide - Logs & Services

    17. ActiveSync 4.x Troubleshooting Guide - Connection Flow

    18. USB Advanced Network Functionality

    19. Microsoft ActiveSync 4.2 Troubleshooting

    20. Using ActiveSync 4.x and Visual Studio 2005 and the Emulator

    21. Understanding ActiveSync or WMDC Partnerships


This document provides an overview of the ActiveSync logs and services that are required to use ActiveSync on your PC.

ActiveSync Logs

There are certain logs that ActiveSync creates when it is installed and when it attempts to synchronize with your PC. These logs can be used to identify the details behind problems you may be having with ActiveSync.  These logs are:

  1. %temp%\activesync.log - Installation log
  2. %windir%\setupapi.log - setupapi log.  Includes device driver installations.
  3. %temp%\wcescomm.log - ActiveSync Communications Log - Resets each time you connect
  4. %temp%\wceslog.log - ActiveSync 3.x and 4.x Services
  5. %temp%\wcesmgr.log - ActiveSync Status
  6. %temp%\outstore.log - Outlook Synchronization Errors

I have created a batch file called Activesync_Logs.bat which will collect all of these logs for you and display them in a notepad document for you to copy and paste as needed to send to your OEM or other individual providing assistance with ActiveSync.

Required Services

ActiveSync 4.x requires certain services to be running in Windows 2000, Windows XP or Windows Server 2003.  The following services must be running on your PC:

  1. COM+ Event System
  2. DCOM Server Process Launcher
  3. DHCP Client
  4. Universal Plug and Play Device Host

I have created ActiveSync_4.x_Start_Required_Srvices.bat to start these services for you. If you are able to connect after running this batch file then review the list of services above to make sure they are started and set to Automatic.

If your problem is not resolved here, try Bev Howard's Solving ActiveSync Issues, the Microsoft ActiveSync Troubleshooter or Microsoft's Knowledge Base search on ActiveSync or Microsoft's Knowledge Base search on Mobile Information Server.

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