In 90% of cases, the issue resolves at Step 1 or Step 2. For the remaining 10%, the VSS DLL re-registration or Hyper-V permission adjustment will restore your backup reliability. If all else fails, Veritas Support can analyze the verbose logs generated from the steps above.
: The admin realizes the System Logon Account on the Backup Exec server might not match the credentials expected by the remote server. 0xe00086cc backup exec