Problem with active sync on symbian devices.

Hallo,

we are running an Exchange server 2003 SP2 and an ISA-Server 2005. Every employee uses a smartphone with windows mobile and active sync. Everything is working fine but we want to use also other device to use active sync.

Now the problem:

I have a SonyEricsson M600i with active sync (roadsync from datavidz). When I configure and test the settings following error appears:

--------------------------------------------------------------------------------------------
DActiveSyncEngine::CanPerformSync() - Priority : 0x1
DActiveSyncEngine::CanPerformSync() - Finished : 0x1
Synchronisierung vorbereiten...
CanConnectToInternet() - Checking Connection.
IAP : Ad-Hoc Bluetooth PAN, Type : LANService, ID : 4
IAP : T-Mobile Inter., Type : OutgoingGPRS, ID : 5
IAP : T-Mobile MMS, Type : OutgoingGPRS, ID : 6
SNAP : Internet, ID : 1
DSymbianV2InternetConnectEngine::SetupConnectionPrefs() - SNAP ID : 1
DSymbianV2InternetConnectEngine::RunL()
mCurrStage=0x1
statusCode=0x0
DSymbianV2InternetConnectEngine::RunL() - Network Status :0x1
Synchronisierung starten...
 2.012 (328)
09.10.2007  17:18:49
Synchronisierung vorbereiten...
DActiveSyncDataManager::PrepareForCalendarSync()
DActiveSyncDataManager::PrepareForContactsSync()
DActiveSyncDataManager::PrepareForEMailSync()
DSymbianMessageManager::HandleSessionEventL() - EMsvServerReady
DSymbianOutlookMessage::GetTempProcessingFolderId() - failed to do GetTempProcessingFolderIdL() with ERR: 0xFFFFFFFFFFFFFFFF
DSymbianMessageManager::CompleteMsvSessionInit() - Failed to prepare the TempProcessing folder with ERR: 0xFFFFFFFFFFFFFFFF
DActiveSyncEngine::RunTask() -  Ready for StartSync
EstablishInternetTimeoutInternalL() - Time Out Sec : 2100
IAP used : 0x5
Bearer ID : 3
MODEM Bearer
LastSocketActivityTimeout : -1
LastSocketClosedTimeout : 2100
DSymbianV2InternetConnectEngine::Connect()
DSymbianV2InternetConnectEngine::SetupConnectionPrefs() - SNAP ID : 1
Internetverbindung herstellen...
IConn - KStartingSelection : 0x0
IConn - KFinishedSelection : 0x0
InternetConnect_ProgressUpdate() Stage - 2501, Error - 0
IConn - KConnectionOpen : 0x0
DSymbianV2InternetConnectEngine::RunL()
mCurrStage=0x2
statusCode=0x0
DSymbianV2InternetConnectEngine::RunL() : KErrNone - Connection created succesfully.
DSymbianHTTPSession::InternetConnect_RecievedResponse() - Connected To Internet
DSymbianHTTPSession::MakeReady() - Removing Validation Filter
Verb. mit Exchange Server...
DActiveSyncEngine::PrepareOptionsCommand() : 0x2
DActiveSyncEngine::PrepareActiveSyncCommand() : 0x2
Initiating Submission of the HTTP Transaction (Symbian)
URL (Built) : https://XXX.XXX.XXX.XXX/Microsoft-Server-ActiveSync?User=tku&DeviceId=359315001855088&DeviceType=RoadSyncClient
DSymbianHTTPTransaction::SubmitSymbianTransaction() - SubmitL() successfull.
Gprs connection successful: 0x5
Verbindung hergestellt!
IConn - KLinkLayerOpen : 0x0
MHFRunL() - STATUS: 0x4
DSymbianHTTPSession::MHFRunL() - EGotResponseHeaders: 440 Login Timeout
Content-Length: 0x2B
MHFRunL() - DONE: 0x0
MHFRunL() - STATUS: 0x5
DSymbianHTTPSession::MHFRunL() - EGotResponseBodyData Size:0x2B
MHFRunL() - DONE: 0x0
MHFRunL() - STATUS: 0x6
DSymbianHTTPSession::MHFRunL() - EResponseComplete
DSymbianHTTPSession::MHFRunL() - EFailed
DActiveSyncEngine::HTTP_RecievedResponse() - HTTP Transaction Failed
Server-FEHLER: 440
DActiveSyncEngine::ProcessCurrentCommandResponse() : EActiveSyncStep_Options
***Versuchen Sie erneut, die
Synchronisierung
durchzuführen! Wenn dieser
Fehler weiterhin auftritt,
führen Sie einen Neustart
Ihres Telefons aus, und
versuchen Sie erneut, die
Synchronisierung
durchzuführen.

Letzte Sync.: *FEHLER* s. Prot.
0x7370D02 (activeSyncErrTransactionFailed)
***Synchronisierung
fehlgeschlagen!
09.10.2007  17:18:57
DStargateAppUi::ActiveSync_ReportError():0x7370D02
DActiveSyncEngine::HTTP_RecievedResponse()
MHFRunL() - DONE: 0x0
DActiveSyncEngine::CancelSyncInternal() - STARTED.
DSymbianHTTPTransaction::CloseSymbianTransaction() - Closing.
DSymbianHTTPSession::DisconnectFromInternet()
DSymbianV2InternetConnectEngine::CloseConnection()
DActiveSyncEngine::CancelSyncInternal() - AdjustPrefs.
CancelSyncInternal() - FINISHED.
DSymbianV2InternetConnectEngine::RunL()
mCurrStage=0x2
statusCode=0x0
DSymbianV2InternetConnectEngine::RunL() : KErrNone - closing connection.
DSymbianV2InternetConnectEngine::CloseConnectionInternal() : Disconnecting from the internet.
Disconnect Finished!
------------------------------------------------------------------------------------------

Sorry it is german. But the important information are given.

Are there different settings for windows mobile devices and others?

The cert. is installed and the settings are:

user: same as windows-login
pass: same as windows-login
server: XXX.XXX.XXX.XXX
domain: our company-domain

Thank you a lot.