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DisableStrictNameChecking (as referenced in my article in SSWUG.org)

By Johan van Soest.

Published : 2014-01-30.

Last updated : 2017-05-02.

Allow DNS Aliases on File Servers.
DNS Aliases (CNAME) work for most of the services on a server but Windows File services have a security feature that blocks this. This can be turned off by adding the Dword value DisableStrictNameChecking and setting it to 1 in the Windows registry at:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters
Or use the Windows Registry file below:

Windows Registry Editor Version 5.00

;*******************************************************************************
;* This registry file enables access to Windows File servers via a DNS Alias
;* (C) Copyright 2009 - 2023 J.P.G. van Soest (www.vansoest.it)
;*******************************************************************************

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters]
"DisableStrictNameChecking"=dword:00000001

The server must be rebooted after applying the registry change.
Warning:This solution modifies the Windows registry. Back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

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