0xe00086cc Backup Exec ((better)) -

The error code 0xe00086cc in Veritas Backup Exec typically signals a "Connection has not been authorized" or "Access Denied" issue.

6. Check Windows Removable Storage Manager (RSM)

• If RSM is running, disable its service (HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NtmsSvc → Start=4) and reboot. Backup Exec must control tape drives exclusively.

At its core, error 0xe00086cc translates to a storage communication failure, often accompanied by the description: "The device is not ready" or "The request could not be performed because of an I/O device error." This indicates that while Backup Exec successfully initiated a job, it lost reliable contact with the target destination—typically a tape drive, a disk-based storage folder, or a deduplication disk. In technical terms, the software’s SCSI (Small Computer System Interface) or network commands are being rejected by the physical or virtual storage layer. This is not a corruption of the data itself, but rather a disruption of the conduit through which that data must flow. 0xe00086cc backup exec

• C:\System Volume Information
• C:\Program Files\Veritas
• C:\Program Files\Symantec\Backup Exec
• All VSS writer temporary locations (check %TEMP% for VSS logs).
• For Hyper-V: Exclude .vhd, .vhdx, .avhd files during backup windows.

Ensure the Windows Management Instrumentation (WMI) service is running and set to Automatic on the target machine. The error code 0xe00086cc in Veritas Backup Exec

The Mystery:The server and the remote agent were talking just fine yesterday. Now, they are suddenly acting like strangers. The Backup Exec server tries to reach out to the remote computer, but the connection is rejected. The Investigation: If RSM is running, disable its service (

Step‑by‑step resolution

1. Check device availability

• Open Device Manager → verify tape drive or disk device appears without yellow exclamation marks.
• For disk storage: ensure the drive letter or mount point exists and is accessible.

If you see this error during an Exchange backup, try disabling the "Enable restore of individual messages" option to see if the job completes.