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You can go into DHCP and look at the reservations and see the computer that has the IP address. &nbsp;That's pretty much it.<br />
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DHCP is associated with the computer, not the user.<br />
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You might be able to track down the user logon by searching the Security log in Event Viewer using that computer name or the IP address in the filter.
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we wrote a login script back in the day to log it to a text file, you could also look at AD Audit from ManageEngine for a package solution. &nbsp;Lastly you can scan for the login event on the domain controller for that user. &nbsp;Not sure of the event code off the top of my head but google knows.
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You can use the first part of my article to get the username added to the computer description which you can then compare to the IP address via the hostname<br />
<a href="https://www.experts-exchange.com/articles/30891/Automated-object-placement-using-AutoAD.html" rel="ugc">https://www.experts-exchange.com/articles/30891/Automated-object-placement-using-AutoAD.html</a>
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Lots of options :-)<br />
nbtstat &nbsp;-A &nbsp;IPadress &nbsp; (such as nbtstat &nbsp;-a &nbsp;192.168.123.123) &nbsp;will return the PC name.<br />
You can then run Systernals (now Microsoft) free PSLoggedOn to see who is logged into that machine. &nbsp;I believe you can even run using the IP so you don't have to use nbtstat<br />
psloggedon &nbsp;\\192.168.123.123 <br />
<a href="https://docs.microsoft.com/en-us/sysinternals/downloads/psloggedon" rel="ugc">https://docs.microsoft.com/en-us/sysinternals/downloads/psloggedon</a>
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Is there a way on a windows server (2012 or 2008) to see the username associated with a dynamic ip address? &nbsp;Or maybe a sofware that can do this?
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Is there a way on a windows server (2012 or 2008) to see the username associated with a dynamic ip address?  Or maybe a sofware that can do this?

How to find an ip address associated with AD username

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.

Windows Server 2012

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.