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Sophos Anti-Virus for NetApp Storage Systems: problems with time discrepancies

With Sophos Anti-Virus for NetApp Storage Systems, if the difference between the time on the NetApp filer and that on either the domain controller or the anti-virus server is greater than five minutes, then error messages similar to those below will be reported when an attempt is made to scan a file:

Fri Nov 19 09:17:56 GMT [CIFSVScan:error]: CIFS - Unable to acquire filer credentials: Clock skew too great.
Fri Nov 19 09:17:56 GMT [CIFSVScan:info]: Connection with \\HUB terminated
Fri Nov 19 09:17:56 GMT [CIFSVScan:warning]: Virus Scanner: ConnectToServer \\HUB failed [0xc000005e]
Fri Nov 19 09:17:56 GMT [CIFSVScan:info]: CIFS: Disconnecting from virus scanner 10.44.100.43.
Fri Nov 19 09:17:56 GMT [CIFSVScan:warning]: CIFS: Virus scanning is enabled but no clients are registered as virus scanners.

What to do

Ensure that there is no significant difference in system time between

If you need more information or guidance, then please contact technical support.