winxp3 authentication errors 0x80090303


testing new ts server all components on 1 machine ,web,gateway etc,
all clients on same domain ts-server
vista clients can rdp in and access webremoteapps using domain accounts ,can use sso no problems
winxp3 clients using same useraccounts vista can't authenticate run webremoteapp
logonbox won't accept either
username   domain\username     or    username@domain  combinations  error 0x80090303

webremoteapp will authenticate , run if logon tsserver\admin seems failure authenticate winxp client.
winxp3 client has credssp
tsserver member of domain , has kerberos delegation enabled ad domain servers
webapp has been published localdomain ca ssl certificate


google suggests kerberos or spn issues vista clients working ok
what have missed please

hi,

please see thread here similar question yours: http://forums.technet.microsoft.com/en-us/winserverts/thread/3861c357-a82c-49d0-a7c3-db3478ea0a38/

please make sure you enable credssp functionality (introduced in servicepack 3) in registry or through group policy per kb here: http://support.microsoft.com/kb/951608

also, can learn more about remote desktop connection 6.1 client update xp sp3 here: http://support.microsoft.com/kb/951616
   
thanks,

~olga



Windows Server  >  Remote Desktop Services (Terminal Services)



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