When viewing a container with a large number of items in ADSIEdit, you may receive the following error:
There are too many items in the folder DC=xxxxxx. Please refine the query parameters or increase the maximum number of items per folder.
The default filter for each container is 10,000 items. To increase the filter, select the parent naming context (Domain, Configuration, Schema, etc.) and click View > Filter in the menu bar. Then enter an appropriate value.