Active Directory Service Interfaces Editor (ADSI Edit) is a Lightweight Directory Access Protocol (LDAP) editor that you can use to manage objects and attributes in Active Directory. ADSI Edit (adsiedit.msc) provides a view of every object and attribute in an Active Directory forest. You can use ADSI Edit to query, view, and edit attributes that are not exposed through other Active Directory Microsoft Management Console (MMC) snap-ins: Active Directory Users and Computers, Active Directory Sites and Services, Active Directory Domains and Trusts, and Active Directory Schema.
Adsiedit.msc will not run unless the Adsiedit.dll file is registered. This happens automatically if the support tools are installed. However, if the support tool files are copied instead of installed, you must run the regsvr32 command to register Adsiedit.dll before you run the Adsiedit.msc snap-in.