Hi,Can we do an upgrade of 2008 SP2 Enterprise with Certificate Services installed to 2008 R2 Enterprise without going through the migration steps, i.e. an inplace upgrade?Active Directory Certificate Services Roles Services installed include; Certification Authority, Certification Authority Web Enrollment, and Network Device Enrollment Service.

Hi,Yes, you can upgrade a Windows Server 2008 CA to Windows Server 2008 R2. Planning the Upgrade or Migrationhttp://technet.microsoft.com/en-us/library/cc742466(WS.10).aspxNote: A complete server backup of the CA computer is highly recommended before an in-place upgrade is started.This posting is provided "AS IS" with no warranties, and confers no rights.