In Active Directory there is an attribute named "otherWellKnownObjects" which is not very well documented but put simply is used to reference other related objects.
When talking about otherWellKnownObjects you will also hear about a term "Well Known GUID". Well Known GUIDs define a related object type. See the lists below for examples.
The otherWellKnownObjects attribute lists these related objects in a format like the following;
B:32:89FB25B7DF784FC198A493E2E8A0EE7E:CN=MyCompany GAL,CN=All Global Address Lists,CN=Address Lists Container,CN=HostedExchange,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=mydomain,DC=com;
Combining the Well known GUID with the DN of the object that has the otherWellKnownObjects attribute set provides you with somewhat of a lookup method. E.g. On the HMC platforms I can obtain the global address list used by the customer in the MyCompany OU by performing an LDAP bind to;
LDAP://<WKGUID=89FB25B7DF784FC198A493E2E8A0EE7E,ou=MyCompany,ou=Hosting,dc=mydomain,dc=com>
Note: Using the otherWellKnownObjects attribute is also handy to reference objects that can be moved or renamed. This works because any time an object is moved or renamed it checks any references to it in the otherWellKnownObjects attribute of other objects and updates them of the change accordingly. An MSDN article has been written about that: http://windowssdk.msdn.microsoft.com/en-us/library/ms676295.aspx
Microsoft HMC / MPS Uses of the otherWellKnownObjects attribute
On the Customer OU
Well Known GUID
Definition
D22DFCC5B73645E99E16C9AD3D61F34F
DN of the Offline Address List for this company
9E444526CB6F4D5C9A59C9A84E26B627
DN of the Address List for this company
89FB25B7DF784FC198A493E2E8A0EE7E
DN of the Global Address List
3841BDA6D81C4095B9BBB838808F5A55
DN of the CN containing the service records
4619BE598BF441DB8C9DB0482E62E386
DN of the CN listing all groups and their types
3B6FF4FA8AA248039AD8F9493A43B704
DN of CSRAdmins@Customer group
65F37ECB46704F0E9300E1FB48E1096E
DN of the Admins@customer group
EA755D448CE64157A20E82B7CCBE14B0
DN to show the organisation type (e.g. private, customer, reseller, hosting)
58888CFC8F7F430C8183102CD5758D81
DN of the parent OU
CC016CF08DEF4EA4A05C9C54B198785A
DN of the customer OU
On each user
B7AE2ABCCBAD41A28973559FCA154DB0
DN of the Customer OU
On the _Private OU
When migrating from Microsoft HMC 3.5 to HMC 4.0 you may come across a little utility named DTMU.exe.
For those who are interested in what the DTMU tool does or are trying to work out what it is doing in the case that it fails, here you are;
DTMU –PrepareAD
DTMU –ResetPW
Hi All,
After about 10 months of talk, I have finally got off my behind and finished the design and implementation of the MS Experts site. Yay!
Initially you will see posts from Russell Tomkins and I. We are looking for more people to join us though. Let us know at admins@msexperts.org if you are interested.
The idea is to share any information that you found hard to find, or where there is no information at all.
Thank you for reading.
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