Third-party applications, such as antivirus software or other backup agents, may be locking files required for the Backup Exec installation. Step-by-Step Troubleshooting Guide 1. Perform a Manual Uninstallation
Verify that the account has over the target installation directories.
Copy the agent installation files (found on the media server in the Agents folder) directly to the remote server. Run setup.exe locally as an Administrator. 0xe00086cc backup exec
This is the default port for the Network Data Management Protocol (NDMP) used by Backup Exec. Ensure it is not being used by another application. 4. Run a Manual Agent Installation
The version of the agent already on the target computer may be too old to be directly upgraded by your current version of Backup Exec. Copy the agent installation files (found on the
Check that the service is started on the target machine. 3. Check Network Connectivity and Ports
For modern versions of Backup Exec, a security trust must be established. Solved: Backup exec access is denied - Experts Exchange Ensure it is not being used by another application
Backup Exec relies on specific ports to communicate with its agents.
If a push installation fails with this error, the most effective fix is to manually clean the target machine. Log into the remote server directly.
Insufficient local administrator rights or restrictive firewall settings (blocking WMI or NDMP ports) can prevent the push installation from completing.