![]() ![]() ![]() if you have 20000 workstations and run this script daily you could exhaust your USN count within a couple of years. If you were to include a time/date stamp (for example) in the description field, ever time a user logs in it will increment the USN. To counter this problem the script does not change if the value is the same, therefore the majority of object descriptions will stay the same and not affect the USN count in a dramatic way. There is a limit to the amount of USN’s that an Active Directory object can have, and this script can cause the USN limit to be reached in a large environment. I could not find the correct documentation or supporting evidence for the below but I believe it is correct – please let me know if I am wrong: REFERENCE: How the Active Directory replication model works Because these USN counters are local, it is easy to ensure that they are reliable and never run backward (that is, they cannot decrease in value). #Vbscript get serial number of monitor updateInstead it uses update sequence numbers (USNs) that are assigned by a counter that is local to each domain controller. Changing the description of a computer object increases the uSNChanged value which allows it to replicate to other domain controllers.Īctive Directory replication does not primarily depend on time to determine what changes need to be propagated. Each time a change is made on an object (like a computer) the attribute on that object (uSNChanged) increases. Active Directory Changes (USN)Īctive Directory uses Update Sequence Numbers (USN) as its primary mechanism to control replication between Domain Controllers. Im happy to modify the script if someone can think of something useful to add. There is a lot more information that we could have included, both from WMI and Active Directory easily but we did not have a need for it. Date – Note I do not use this, but have added it to the script for some that may want to.Serial number – helps to verify quickly with our asset inventory system – not required but useful nonetheless.Make and Model – Useful to determine what form factor they are (Laptop/Desktop/Tablet).Include user name – helps find user in active directory. #Vbscript get serial number of monitor fullInclude users Full Name – Helps the technician when they call the user.The Requirementsīelow are the list of requirements we had for our environment. Originally we were hoping to use SC12 reporting but it was too slow and cumbersome to bring up details.įor this simple task I tackled it simply with a log-on script and a small amount of config to Active Directory. ![]() ![]() Our support staff could now go to Active Directory and see useful information populated in the description field for all computers. In our particular environment we had this very need even more so as we adopt automatic operating system deployments that use generated computer names containing serial numbers. What we needed was an easy way to find out what the last logged on user was for every machine. Its simple stuff really, but unless you have 3rd party systems like System Center 2012 (SC12) or client agents, its either hard or time consuming to find out the relation between users and computers. Having worked in help-desk roles in the past I know the importance of knowing which user has logged onto which computer. ![]()
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