Administrator's console of Desktop and Laptop Option (DLO) shows a valid Maintenance server as an "Unknown server"

Article:TECH167547  |  Created: 2011-08-19  |  Updated: 2012-07-27  |  Article URL
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Technical Solution




We see an "Unknown server" listed as a DLO maintenance server under


There is no specific error.

The DLO admin console may freeze or become unresponsive after performing certain administrative tasks.


Applies to NetBackup DLO and Backup Exec DLO with multiple remote Maintenance servers on Windows 2008


The DLO administration server was losing connectivity to the remote Windows maintenance server.

Access to admin shares on the remote Windows maintenance server was not possible (example: \\<hostname>\c$)



The problem was resolved after installing Service Pack 1 of Windows 2008 R2

If the problem persists, check if Symantec Endpoint Protection 11.0 installed on the remote server. SEP 11.0 has a known issue with accessing network shares. Refer the article below for a fix.

Windows Servers stop accepting network connections with Symantec Endpoint Protection 11.0 installed

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