HowTo: Display what members were removed from a group

Features shown are only available in NetTools v1.29.11 or later

In this post we look at how to show which members, i.e. users, computers, groups etc, have been removed from a group.  Within NetTools this is a simple task using the AD Properties dialog, the Members tab shows, the current members of the group but also which objects have been removed and when, as shown in the screenshot below.

To understand how NetTools is able to display this information, we need to look at the msDS-ReplValueMetaData attribute for the group. This attribute contains the details of the metadata for each value of an attribute for the object. We can view the details of the attribute in the Meta Data dialog, which can be opened from the AD Properties dialog using the Meta Data button or from the various context menus within Nettools.

Here is the Meta Data dialog for the same group shown above, the top section of the dialog shows the details of the msDS-ReplAttributeMetaData attribute used to store the replication details for the attributes of the object, the lower section shows the meta data details from the msDS-ReplValueMetaData attribute showing the replicated values for attributes that have Object (DN-DN) data types, i.e. member.

In this example you can see the list of changes that have be made to the member’s attribute of the object, each change to the member attribute is listed as a separate line, the line includes a Originated, Create and Delete time columns.  The Create and Delete columns are used to record when an item was added or removed from the attribute.  When an item is added, only the created time is populated, and then when the item is subsequentially removed both the create and delete times are set. The created time still exists to ensure that the AD replication is consistent.  NetTools AD Properties dialog will enumerate the msDS-ReplValueMetaData entries and display the entries that have the deleted time set in the Removals section of the Member tab.

Also See:
NetTools Basics
NetTools AD Properties Dialog
How Group Changes Works

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