Backup Exec uses AOFO to grab open files. However, if the target disk is an iSCSI drive, a ReFS volume, or a deduplication drive, AOFO sometimes fails with 0xe00086cc .
Does this error happen during a backup, or a standard file system backup?
Verify that a valid exists. If it is missing, create a new one and mark it as the Default Logon Account . 0xe00086cc backup exec
Locate the specific service account assigned to Backup Exec.
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Follow these five remediation steps sequentially to isolate and fix the root cause of the error. 1. Re-Synchronize the Backup Exec Service Account (BESA)
1. Validate and Synchronize the Backup Exec Service Account (BESA) Verify that a valid exists
For modern versions of Backup Exec, a security trust must be established. Solved: Backup exec access is denied - Experts Exchange
Follow this systematic approach to identify and resolve the issue: