Anyone come across the following errors in their event log: Event ID: 5719 This computer was not able to set up a secure session with a domain controller in domain mydomain due to the following: There are currently no logon servers available to service the logon request. This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator. ADDITIONAL INFO If this computer is a domain controller for the specified domain, it sets up the secure session to the primary domain controller emulator in the specified domain. Otherwise, this computer sets up the secure session to any domain controller in the specified domain. Event ID: 7 The kerberos subsystem encountered a PAC verification failure. This indicates that the PAC from the client nuisasrvr$ in realm my.domain.com had a PAC which failed to verify or was modified. Contact your system administrator. This ISA server computer isn't a domain controller and I can access the domain controller fine. The ISA server passes a netdiag fine so I'm kinda lost on where to check next. Any responses are appreciated.