Cannot access the Admin$ share on the target computer when running backup. (4216816)

Cannot access the Admin$ share on the target computer when running backup.

When using a least privileged user account to run a backup as described in the user guide, the backup operation fails with the error:

"Cannot access the Admin$ share on the target computer. Make sure the Admin$ share is accessible and try again."    

The backup agents are installed and show up in console.

The issue occurs on RMAD Forest edition. When using a least-privileged account. If the "Ensure Forest Recovery Agent is deployed" checkbox is enabled, the account will be used to check if the Forest Recovery Agent is installed, if it's not installed it will try to install it, all of this is done through the Admin$ share on the DC. Since the account does not have administrative access on the target, the backup operation fails with the described error.

If you know the Forest Recovery Agent is already installed, uncheck the "Ensure Forest Recovery Agent is deployed":

• Right click the affected Computer Collections and select Properties.
• Select the Agent Settings Tab.
• Uncheck the "Ensure Forest Recovery Agent is deployed" checkbox.

If the Forest Recovery Agent has not been installed, install it manually from the RMAD setup files.