I recently watched the below webcast on Activesync.  It was very informative and had lots of great detail.  Below are my notes after watching that Webcast.

 - Conrad

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TechNet Webcast: Troubleshooting Exchange Activesync and Outlook Mobile Access (Level 300)

http://msevents.microsoft.com/cui/EventDetail.aspx?culture=en-US&EventID=1032271758&EventCategory=3

Open ActiveSync information for a given user

Open as a “Web Folder” using Internet Explorer (File>Open....check the "Open as Web Folder" checkbox)

/exchange//NON_IPM_SUBTREE/Microsoft-Server-ActiveSync">https://<ExchangeURL>/exchange/<Username>/NON_IPM_SUBTREE/Microsoft-Server-ActiveSync

OMA Enabled Attributes: http://support.microsoft.com/?kbid=830188

Exchange Wide:

• Object: DC/Configuration/Services/Microsoft Exchange/<Org>/Global Settings/OutlookMoblieAccess/
• Attribute: msExchOmaAdmin: -2147483648

 Per User:

• User Object: <Path>
• Attribute: MSExchOMAAdminWirelessEnable
• Otherstuff:
• MSExchangOmaAdminExtendedSettings

PPC 2002

• SSL is hard coded
• Performs validation
• Can disable or use "AddRootCert" utility to add a cert

PPC 2003

• SSL is optional

Exchange ActiveSync and Outlook Mobile Access errors occur when SSL or forms-based authentication is required for Exchange Server 2003

http://support.microsoft.com/?id=817379

Common Issues:

• Forms Based Auth on BE Server
• Required SSL on /Exchange vdir on BE Server
• Certificate Trusted Root on on device
• Different certificate name in URL to Exchange
• Wrong Cert installed on ISA Server (or no cert installed)

Device Error Codes

• Dev
• MIS
• SYNC
• HTTP
  • 403 - User does not have permissions to Sync.  SSL is required on /Exchange Vdir.
  • 500 - Point to Exchange Virtual Directory has a problem.
  • Also points to user Mailbox Naming Issues.
    • SMTP:Hol@nwtraders.com
    • smtp:holly@contoso.com (M: Drive points to this one.)
    • Issue is in the "Left/Right" naming
    • Add another Proxy Address in the Registry
• CONNMGR
• INTERNET
• INT
  • 7 - DNS Problems
  • 29 - Certificates
  • 45 - Certificate Trusted Root not on device

How To Troubleshoot Server ActiveSync

http://support.microsoft.com/?id=330461

How to use INTERNET_<Code> error messages to troubleshoot Server ActiveSync connectivity issues

http://support.microsoft.com/?id=330465

List of Connection Manager message codes

http://support.microsoft.com/?id=330466

XCCC: How to troubleshoot server ActiveSync HTTP error codes

http://support.microsoft.com/?id=330463

You receive an HTTP_500 error message when you synchronize your mobile device with Microsoft Exchange Server 2003

http://support.microsoft.com/default.aspx?scid=kb;en-us;886346

Virtual Internet Information Services (IIS) Directories That Are Used by Outlook Web Access in Exchange Server 2003

http://support.microsoft.com/default.aspx?scid=kb;en-us;821898

"HTTP 500 - Internal Server Error" Error Message When You Use Outlook Web Access to Connect to Your Microsoft Exchange Server 2003 Mailbox

http://support.microsoft.com/default.aspx?scid=kb;en-us;829167

Fine-tuning and known issues when you use the Urlscan utility in an Exchange 2003 environment

http://support.microsoft.com/default.aspx?scid=kb;en-us;823175

You receive a "SYNC_5" or a "MIS_5" error message when you try to synchronize your Pocket PC or Smartphone calendar with your Exchange 2000 Server, Mobile Information Server 2002, or Exchange 2003 Server mailbox

http://support.microsoft.com/default.aspx?scid=kb;en-us;842541

Description of Outlook 2003 with Cached Exchange Mode in an Exchange Server 2003 environment

http://support.microsoft.com/default.aspx?scid=kb;en-us;870926

 Server ActiveSync does not download all items during a synchronization session

http://support.microsoft.com/default.aspx?scid=kb;en-us;827615

ActiveSync Troubleshooting Guide Mobile Information Server / Outlook Mobile Access

http://www.cewindows.net/faqs/activesync/mis.htm