Today, I discuss how to protect your company from uncontrolled RID pool depletion and keep your domain bustling for decades to come. Background Relative Identifiers (RID) are the incremental portion of a domain Security Identifier (SID). For instance: S-1-5-21-1004336348-1177238915-682003330–2100 ==> S-1-5-Domain Identifier–Relative Identifier A SID represents a unique trustee, also known as a “security principal” – typically users, groups, and computers – that Windows uses for access control. Without a matching SID in an access control list, you cannot access a resource or prove your identity. It’s the lynchpin. Every domain has a RID Master: a domain controller that hands each DC a pool of 500 RIDs at a time. A domain contains…

This page categorizes the Active Directory troubleshooting information that is spread all over the Internet, so you can get to the resource you need to solve your specific issue. Table of Contents Troubleshooting Overviews Collecting Information Useful Utilities Active Directory Events Event Sources Active Directory Limitations Active Directory Replication Issues Services or Access Denied Performance Issues See Also Troubleshooting Overviews You might want to check out these overviews, flow charts, and general Active Directory troubleshooting strategy resources if you are not quite sure where to start: Active Directory Troubleshooting Flow Chart   (PDF by Sean Deuby) Active Directory Troubleshooting Overview   (written for Windows 2000, but much of it still applies) High-level Methodology for Troubleshooting Active…

http://social.technet.microsoft.com/wiki/contents/articles/15232.adds-audit.aspx Event ID Description 4741 – A computer account was created. 4742 – A computer account was changed. 4743 – A computer account was deleted. 4739 – Domain Policy was changed. 4782 – The password hash an account was accessed. 4727 – A security-enabled global group was created. 4728 – A member was added to a security-enabled global group. 4729 – A member was removed from a security-enabled global group. 4730 – A security-enabled global group was deleted. 4731 – A security-enabled local group was created. 4732 – A member was added to a security-enabled local group. 4733 – A member was removed from a security-enabled local group. 4734 –…

SCHEMA: The schema is the Active Directory component that defines all the objects and attributes that the directory service uses to store data. The physical structure of the schema consists of the object definitions. The schema itself is stored in the directory. Objects: An object is the structure within which the data is stored along with the content and structure and example of an object is a User Account Object along with data regarding the syntax of the User Object. A Part of the data in an object comes from the attribute component. Attributes: These define the character of an object; attributes contain data that defines an object. Examples of…

nltest /server:savdaldc02.savilltech.com /dsregdns S.NO TOPICS VERSION EXPLAIN SOLUTION Displays calls that have not yet been answered repadmin /showoutcalls * List the Topology information repadmin /bridgeheads * /verbose Inter Site Topology Generator Report repadmin /istg * /verbose Summarize the replication status and view overall health repadmin /replsummary Show replication partner and status repadmin /showrepl Show replication partner for a specific domain controller repadmin /showrepl <ServerName> Show only Replication Errors repadmin /showrepl /errorsonly Show replication Queue Repadmin /Queue REPADMIN /showobjmeta displays the replication partners for each NC Repadmin /showrepl /repsto Repadmin /queue Repadmin /viewlist * How to Force Active Directory Replication repadmin /syncall dc1 /AeD Push replication CMD repadmin /syncall dc1 /APeD…

KCC: generates and maintains the replication topology for replication within sites and between sites. KCC runs every 15 minutes.I ISTG: is responsible for creating Active Directory Replication Connection objects for appropriatebridgehead servers within its site. Intersite replication can utilize either RPC over IP or SMTP toconvey replication data.

Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secretkey cryptography.

Netlogon needs: Maintains a secure channel between this computer and the domain controller for authenticating users and services. If this service is stopped, the computer may not authenticate users and services, and the domain controller cannot register DNS records.”

Res1.logs Res2.log: This is reserved transaction log files of 20 MB (10 MB each) which provides the transaction log files enough room to shutdown if the other spaces are being used. Garbage Collection: is a process that is designed to free space within the Active Directory database. This process runs independently on every DC with a default lifetime interval of 12 hours. ★ Removing “tombstones” from the database. Tombstones are remains of objects that have been previously deleted. ★ Deletion of any unnecessary log files. ★ The process launches a defragmentation thread to claim additional free space. Online Defragmentation: method that runs as part of the garbage collection process. The…