“The LastLogonTimeStamp Attribute” – “What it was designed for and how it works” - Ask the Directory Services Team - Site Home - TechNet Blogs

“The LastLogonTimeStamp Attribute” – “What it was designed for and how it works” - Ask the Directory Services Team - Site Home - TechNet Blogs: "It is important to note that the intended purpose of the lastLogontimeStamp attribute to help identify inactive computer and user accounts. The lastLogon attribute is not designed to provide real time logon information. With default settings in place the lastLogontimeStamp will be 9-14 days behind the current date."