[cifs-protocol] Re: [Pfif] How are 'supported enc types' determined in trusts? - 600253

Stefan (metze) Metzmacher metze at samba.org
Mon Sep 8 14:35:01 GMT 2008

Richard Guthrie schrieb:
> Andrew,
> If you have a windows 2008 server acting as a member server in a downlevel domain (for this discussion we will assume 2003 functional level), this attribute will only exist if you extend the schema to a level that is compatible with 2008 functional level.  This is a normal step as part of an upgrade from Windows 2000 -> 2003 or Windows 2003 -> 2008.  The following kb article describes this process in more detail http://technet.microsoft.com/en-us/library/cc773360.aspx.
> It will show up in the schema for computer accounts as well as being an attribute on objects where objectClass == trustedDomain.  It does not matter if the domain controller is still Windows 2003, the computer account and TDO will have this attribute.  The value of this attribute will show up as 'Not Set' in a tool such as ADSIEdit (see attached msds-SupportedEncryptionTypes.zip).  This is the same as saying the attribute is null.  It will not be in use until the domain functional level is set to 2008.  Setting the functional level to 2008 requires that all the domain controllers be upgraded to Windows Server 2008.  Schema version can be set independently of the functional level to facilitate seamless upgrade scenarios.
> As to your second question, this attribute value is not dependent on trust type/attribute flags. It also will not have a value unless someone explicitly sets it.  In the case of computer accounts this attribute is set by netlogon during secure channel initiation.

Can you explain that process a bit further, please?


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