Exchange 2003 ActiveSync is not working. Event Viewer shows nothing...

you need to check the iis logs for the connection attempts and http errors

Where are the IIS logs typically?

c:\windows\system32\logfiles\w3svc1

you are looking for entries that have /Microsoft-Server-ActiveSync

I'm not clear on what I need to see here, the CSV is very cryptic...

search for ActiveSync and at the end of the line should be an HTTP error code
just post a few lines and I'll decrypt (replace your domain name with a fake)

Please have a read through my Exchange 2003 / Activesync article, check your IIS settings, check you have the pre-requisites, run the tests and report back the errors (if any) from running the test on the test site referenced in my article:
https://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_1798-Exchange-2003-Activesync-Connection-Problems-FAQ.html 

I'm not seeing any "errors" in this report... I do see activesync commands though.  Here are a few lines...

123.456.789.101, mydomainname\username, 8/12/2010, 11:09:08, W3SVC1, EXCHANGESERVER, 192.168.192.45, 15, 314, 587, 200, 0, OPTIONS, /Microsoft-Server-ActiveSync, User=username&DeviceId=4607E5BAA31B80721CBC49ADAD197A3B&DeviceType=PocketPC&Log=VNATNASNC:0A0C0D0FS:0A0C0D0SP:0C0I0S0R0S0L0H,
192.168.192.45, -, 8/12/2010, 11:09:08, W3SVC1, EXCHANGESERVER, 192.168.192.45, 0, 430, 2095, 401, 0, PROPFIND, /username@domain.com/NON_IPM_SUBTREE/Microsoft-Server-ActiveSync/PocketPC/4607E5BAA31B80721CBC49ADAD197A3B, -,
192.168.192.45, DOMAIN\username, 8/12/2010, 11:09:08, W3SVC1, EXCHANGESERVER, 192.168.192.45, 0, 639, 1830, 404, 1260, PROPFIND, /username@domain.com/NON_IPM_SUBTREE/Microsoft-Server-ActiveSync/PocketPC/4607E5BAA31B80721CBC49ADAD197A3B, -,
192.168.192.45, DOMAIN\USERNAME, 8/12/2010, 11:09:08, W3SVC1, EXCHANGESERVER, 192.168.192.45, 0, 244, 1830, 404, 1260, MKCOL, /username@domain.com/NON_IPM_SUBTREE/Microsoft-Server-ActiveSync, -,
123.456.789.101, domain\username, 8/12/2010, 11:09:08, W3SVC1, EXCHANGESERVER, 192.168.192.45, 0, 428, 313, 500, 0, POST, /Microsoft-Server-ActiveSync, User=username&DeviceId=4607E5BAA31B80721CBC49ADAD197A3B&DeviceType=PocketPC&Cmd=FolderSync&Log=V4TNASNC:0A0C0D0FS:0A0C0D0SP:1C2I691S7320R0S0L0H0P,

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give a try on https://www.testexchangeconnectivity.com

check to make sure your exchange virtual directory in iis manager is not set to require ssl
in system manager ensure that your http virtual directory is not using forms based authentication

Forms Based Authentication is not going to cause a problem for Activesync as long as the exchange-oma virtual directory is present.
SBS enables FBA by default and includes the exchange-oma virtual directory, so if you have FBA enabled, you simply need to create the exchange-oma virtual directory.
Either way - my article will guide you as to what IIS settings you need.

Attached doc contains results from https://www.testexchangeconnectivity.com/

It looks ugly...

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ExRCA-is-testing-Exchange-Active.docx

remember you have exchange 2003 so the autodiscover errors can be ignored

you just want to run the activesync test

I must have some serious issues, Alan...  Your guide didn't work for me...  I       ExRCA is attempting the FolderSync command on the Exchange ActiveSync session.  HTTP Error 500.

I followed your guide, but it seems that nothing is working.  I rebuilt the virtual directories, and no dice.  Any tips?  I'm completely furious that I can't get this to work!

I notice that if I go into Microsoft-Server-ActiveSync Directory Security, it DOES NOT save when I change the "Require Secure Channel (SSL)" box.  The box is unchecked when I reopen it.  What gives?

take a look at the following
http://support.microsoft.com/kb/330463

Did not work... :(

Sometimes the HTTP 500 error is beyond my article : (
But - one other thing to check before throwing in the towel and calling Microsoft.  Please check the following registry key and delete the M if it is present :
HKEY_LOCAL_MACHINE \ System \ CurrentControlSet \ Services \ EXIFS \ Parameters DriveLetter=M
Rremoved "M" so that the value is empty.
 

Weird about the lack of IIS settings stick.  Looking into that for you.

Nothing is working, I continue to have the exact same errors.  I am wondering if there is something more I could be doing.  Please advise.  Many thanks.

What is the history of the server?
What changed inbetween it working happily and it not working?  Any ideas?

We were having issues with Exchange and Active Directory communicating.  It was causing the server to crash.  The issue was resolved by following a KB article.  There was really no explanation as to why this was happening.  There was nothing that occurred prior to that.

what was the kb article?

I am afraid I could not tell you that right now.  The admin who provided that KB is not available at the present time, nor will he be anytime soon.... :S

How long ago were the changes made which broke Activesync?
Are you able to perform a System State Restore back to the time before Activesync went South?  Perhaps a bit drastic, but at this point, it is either that or a call to MS.  You may have other issues that need hands-on support and we are not allowed to get hands-on sadly.

We're not certain if the changes that were made truly affected ActiveSync.  

Perhaps my next question I post should be, "Is ExMerge the best way to migrate Exchange 2003 (x86) mailboxes over to Exchange 2010?"  

Thank you so much for your help.  I am not sure what to do as of now.  

I do have a MAPS membership.  Do you know something I don't know?

Yes - register for Free Business Critical Support (unlimited) which comes as part of MAPS - only it might not be too well advertised.
It can take a couple of days to get the right codes to breach their phone systems after activiating the support (and you have to re-register upon renewing MAPS), but once active, you can ring them all you like for Business Critical support.  Just let them know that this issue is killing your business and they will call you back within 2 hours.

Some useful info here:
https://partner.microsoft.com/40016472 

Did you call MS and if so - what was the solution?
Thanks for the points.
Alan

I am having the same issue on a SBS2003 server. Nothing changed on the server, but ActiveSync seems to have quite working with no error messages in the System or Application event logs. Did you ever get yours fixed?

If you want me to help you troubleshoot it - please open up a new question and let me know the link.

Alan