after the power failure, i am not able to access our domain server (windows 2008 r2) when i type our admin user name and password its say wrong user name or password.

Hello, Power failures does not change admin passwords. If you have another domain admin account, use it to reset your admin password. If not, restore your server using an authoritative restore from a backup. Use DSRM mode for that. Please also check the used keyboard language. Maybe it had switched to another one (Example form QWERTY to AZERTY) This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator Microsoft Certified IT Professional: Server Administrator

Hello, maybe the keyboard layout is changed and/or capitals are enabled, a power outage will NEVER change any password.Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.