title: SQL Server 2005 getting Error: 18456, Severity: 14, State: 16. in log
body: <p>SQL Server 2005 SP4 Standard Edition 32-bit.</p>
  
  <p>One to a few times during the work day, seemingly at random, I am getting a log entry of "Login failed for user '<em>OurDomain</em>\mfreeman'. [CLIENT: 192.168.0.48]". This is paired with a log entry of "Error: 18456, Severity: 14, State: 16." at the same time.</p>
  
  <p>This is my own login (which has the sysadmin role in the instance), and it is coming from my workstation. </p>
  
  <p>I captured an example of this with Profiler and found that it is for the master database (which is online and not having any troubles -- I can run queries against it in SSMS just fine) and is coming from an ApplicationName of ".Net SqlClient" (which could be anything).
  I am not getting any visible errors in any applcations (such as VS2012 with SSDT and Report Builder) or SSMS add-ins that I am using (ApexSQL Complete, SSMS Tools, Dell Spotlight Essentials).</p>
  
  <p>Is there any way to find out more specifically what might be attempting the access or why it might be failing?</p>