As I have the sae issue, here my details: Environment PA-3250 with 10.1.2, GP 5.2.6 with "allways-on with pre-logon". AD integration is just LDAP, no Kerberos. User-ID is configured. SSO works until user changes her AD password. GP clients requests the password after reboot (but not when shutdown/start, weird!!). SSO works again until next password change. By the way, the password is asked twice. GP log shows invalid user/password for portal and gateway.
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