ActiveSync Error - 0x8600010b - Could Not Syncronize [unknown]

We have Small Business Server 2003 Premium SP1 with Exchange 2003. We are
having difficulty synchronizing mobile devices (multiple smartphones and
PDAs) with Exchange. Each time we try to sync, it connects, authenticates
and downloads the folder hierarchy within the user's Outlook/Exchange
mailbox. It then 'crashes' and gives us the error message listed in the
subject of this post.

We have not gotten this to succeed at any point on any device.

We are using SSL, have generated our own cert and have either a) downloaded
both the root cert as well as the server cert to the WM 5.0 mobile devices or
b) Used DisableCertChk to disable SSL cert checking on earlier PPC devices...

We have verified that OWA, OMA & all web/SSL components are working just
fine - perfectly, in fact. Additionally, I have already resolved many of the
common errors with Activesync regarding SSL certs, Basic/NTLM authentication,
Forms Authentication, Exchange-OMA virtual directories & ISA FW traffic
blocking. I have searched MSDN, Google & the MS KB for any indication of
this particular error and cannot find ANY articles that address this specific
code.

Also, in looking at the Activesync log, one direct question I do have is,
'what are the XML status codes?' In other words, the very last line in the
log below states <STATUS>8</STATUS>. What are the various status codes that
can be returned? And, furthermore, are these codes relative to XML more than
they are to any particular Activesync operation? I have been unable to find
further info on these codes either...it may help me find the direction of our
next step...

What I "see" happening during the sync process is as follows:

1) Mobile device hits the Internet using SSL
2) Mobile device attempts to connect to our Exchange server
3) ISA accepts & allows the client request
4) Mobile device connects to our server
5) IIS accepts the request and 'passes it' to Active Directory for
authentication
6) User is successfully authenticated
7) Mobile device issues PROPFIND, etc. commands
8) Server responds with 200 OK and continues the connection
9) Mobile device issues a GET HIERARCHY command
10) Server responds with the user's inbox hierarchy (successfully)
11) Mobile device issues the SYNC command
12) Server responds with 200 OK & (XML?) status code 8 (failed?)
13) Mobile device displays the 'Could not synchronize [unknown]' error with
a status code of 0x8600010b

As I mentioned, I also tried this with older devices using PPC
2002/2003...same result, but the error code is different - 0x80004005 -
Synchronization failed. Try again...etc.

I have included sample log file output in this post for your review.

Any help wold be greatly appreciated as I am quickly running out of ideas...

Thanx!!

Dustin.

SAMPLE LOG FILE OUTPUT (Key data has been altered to remove our specific info)
=-= Build 14410 =-=
=-= No XIP Information Available =-=
<MAIL.MYSERVERDOMAIN.COM>

=-=- [15/6/2006 0:22:44.0] -=-=
=-=-=-= Client Request =-=-=-=
OPTIONS
Microsoft-Server-ActiveSync?User=<USERNAME>&DeviceId=BD4AE7A7AD0FB7 D3EFD28149D61B1F18&DeviceType=PocketPC
Accept-Language: en-us

-=-=-=- Start of Body -=-=-=-


=-=- [15/6/2006 0:22:50.0] -=-=
=-=-=-= Server Response =-=-=-
HTTP/1.1 404 Not Found
Content-Length: 103
Content-Type: text/html
Server: Microsoft-IIS/6.0
Date: Thu, 15 Jun 2006 00:22:20 GMT
Connection: close



=-=- [15/6/2006 0:22:50.0] -=-=
=-=-=-= Client Request =-=-=-=
POST
Microsoft-Server-ActiveSync?User=<USERNAME>&DeviceId=BD4AE7A7AD0FB7 D3EFD28149D61B1F18&DeviceType=PocketPC&Cmd=GetHier archy
Accept-Language: en-us

-=-=-=- Start of Body -=-=-=-


=-=- [15/6/2006 0:22:55.0] -=-=
=-=-=-= Server Response =-=-=-
HTTP/1.1 200 OK
Date: Thu, 15 Jun 2006 00:22:25 GMT
Server: Microsoft-IIS/6.0
MicrosoftOfficeWebServer: 5.0_Pub
X-Powered-By: ASP.NET
Pragma: no-cache
Content-Type: application/vnd.ms-sync.wbxml
Content-Length: 403
MS-Server-ActiveSync: 3.0.4215.0


-=-=-=- Start of Body -=-=-=-
<?xml version="1.0" encoding="utf-8"?><Folders
xmlns="FolderHierarchy:"><Folder><DisplayName>Dele ted
Items</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-ce6a</ServerId><Type>4</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Drafts</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-df2a</ServerId><Type>3</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Inbox</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-ce67</ServerId><Type>2</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Junk
E-mail</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-9113cf</ServerId><Type>1</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Outbox</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-ce68</ServerId><Type>6</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Sent
Items</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-ce69</ServerId><Type>5</Type><ParentId>0</ParentId></Folder></Folders>

=-=- [15/6/2006 0:22:55.0] -=-=
=-=-=-= Client Request =-=-=-=
POST
Microsoft-Server-ActiveSync?User=<USERNAME>&DeviceId=BD4AE7A7AD0FB7 D3EFD28149D61B1F18&DeviceType=PocketPC&Cmd=Sync
Accept-Language: en-us
Content-Type: application/vnd.ms-sync.wbxml
Accept-Encoding: gzip

-=-=-=- Start of Body -=-=-=-
<?xml version="1.0" encoding="utf-8"?><Sync
xmlns="AirSync:"><Version>1.0</Version><Collections><Collection><Class>Contacts</Class><SyncKey>0</SyncKey></Collection></Collections></Sync>

=-=- [15/6/2006 0:22:58.0] -=-=
=-=-=-= Server Response =-=-=-
HTTP/1.1 200 OK
Date: Thu, 15 Jun 2006 00:22:28 GMT
Server: Microsoft-IIS/6.0
MicrosoftOfficeWebServer: 5.0_Pub
X-Powered-By: ASP.NET
Pragma: no-cache
Content-Type: application/vnd.ms-sync.wbxml
Content-Length: 18
MS-Server-ActiveSync: 3.0.4215.0


-=-=-=- Start of Body -=-=-=-
<?xml version="1.0" encoding="utf-8"?><Sync
xmlns="AirSync:"><Version>1.0</Version><Status>8</Status></Sync>

=-=- [15/6/2006 0:22:58.0] -=-=
=-=-=-= Client Request =-=-=-=
POST
Microsoft-Server-ActiveSync?User=<USERNAME>&DeviceId=BD4AE7A7AD0FB7 D3EFD28149D61B1F18&DeviceType=PocketPC&Cmd=GetHier archy
Accept-Language: en-us

-=-=-=- Start of Body -=-=-=-


=-=- [15/6/2006 0:22:58.0] -=-=
=-=-=-= Server Response =-=-=-
HTTP/1.1 200 OK
Date: Thu, 15 Jun 2006 00:22:29 GMT
Server: Microsoft-IIS/6.0
MicrosoftOfficeWebServer: 5.0_Pub
X-Powered-By: ASP.NET
Pragma: no-cache
Content-Type: application/vnd.ms-sync.wbxml
Content-Length: 403
MS-Server-ActiveSync: 3.0.4215.0


-=-=-=- Start of Body -=-=-=-
<?xml version="1.0" encoding="utf-8"?><Folders
xmlns="FolderHierarchy:"><Folder><DisplayName>Dele ted
Items</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-ce6a</ServerId><Type>4</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Drafts</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-df2a</ServerId><Type>3</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Inbox</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-ce67</ServerId><Type>2</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Junk
E-mail</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-9113cf</ServerId><Type>1</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Outbox</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-ce68</ServerId><Type>6</Type><ParentId>0</ParentId></Folder><Folder><DisplayName>Sent
Items</DisplayName><ServerId>2b9c185f572fd511beaf00b0d079 d711-ce69</ServerId><Type>5</Type><ParentId>0</ParentId></Folder></Folders>

=-=- [15/6/2006 0:22:59.0] -=-=
=-=-=-= Client Request =-=-=-=
POST
Microsoft-Server-ActiveSync?User=<USERNAME>&DeviceId=BD4AE7A7AD0FB7 D3EFD28149D61B1F18&DeviceType=PocketPC&Cmd=Sync
Accept-Language: en-us
Content-Type: application/vnd.ms-sync.wbxml
Accept-Encoding: gzip

-=-=-=- Start of Body -=-=-=-
<?xml version="1.0" encoding="utf-8"?><Sync
xmlns="AirSync:"><Version>1.0</Version><Collections><Collection><Class>Contacts</Class><SyncKey>0</SyncKey></Collection></Collections></Sync>

=-=- [15/6/2006 0:23:0.0] -=-=
=-=-=-= Server Response =-=-=-
HTTP/1.1 200 OK
Date: Thu, 15 Jun 2006 00:22:30 GMT
Server: Microsoft-IIS/6.0
MicrosoftOfficeWebServer: 5.0_Pub
X-Powered-By: ASP.NET
Pragma: no-cache
Content-Type: application/vnd.ms-sync.wbxml
Content-Length: 18
MS-Server-ActiveSync: 3.0.4215.0


-=-=-=- Start of Body -=-=-=-
<?xml version="1.0" encoding="utf-8"?><Sync
xmlns="AirSync:"><Version>1.0</Version><Status>8</Status></Sync>