When attempting to backup a 64 bit DC using the pre-installed agent you get the following error message:
Error The target computer has a 64-bit hardware platform. ERDisk does not support backing up and restoring to the 64-bit hardware platforms. '
This occurs when you setup the preinstalled agent with the silent '/q' switch as per page 27 of the User Guide and has been acknowledged as an issue with the silent install code.
1. On the 64 bit DC, open Control Panel | Add or Remove Programs and remove the 'Quest backup agent'.
2. Install the package with the following settings 'msiexec.exe /i "c:\rmad\agent\backupagent.msi" ERDPORT=3843 WIN64=1 /qn', substituting path to .msi and port used in your environment.
Waiting for fix in a future release of Recovery Manager for AD.
This was found in 7.5.1 but affects 7.5.0 and 7.5.2 as well.