Environment: Windows Server 2K8, Exchange 2K10 This is the first exchange server I'm trying to install. I get to copying files in the installer and it dies with exchangeserversetup.msi error code 1603. I look in the install logs and it says Error in rollback skipped, no system restore sequence number for this installation I've check the CRL in internet options and that's turned off. Any ideas?

Can you post more of your logs if possible? Try this http://social.technet.microsoft.com/Forums/en-US/exchangesoftwareupdate/thread/6157607f-019b-4fc8-bde3-ede4920ef137

hi, plese follow this MS TEchnet instruction http://support.microsoft.com/kb/981474 in order to get rid of the error. regards Thomas Paetzold visit my blog on: http://sus42.wordpress.com

Hi, What is the status of the issue?Gulab Prasad, MCITP: Exchange Server 2010 | MCITP: Exchange Server 2007 MCITP: Lync Server 2010 | MCITP: Windows Server 2008 My Blog | Z-Hire Employee Provisioning App