Merge-SPLogFile Cmdlet in SharePoint
This is one of those cmdlets that makes your life a lot easier. Rather than logging in on each server to search for a correlation ID, just use this cmdlet. It searches the logs on each server and returns those items relevant to the parameter you used. In the case below, the correlation ID. Merge-SpLogFile -StartTime “10/22/2014 9:49 AM” -EndTime “10/22/2014 9:57 AM” -Path D:\UPA.log -Correlation ID
Source: http://technet.microsoft.com/en-us/library/ff607721(v=office.15).aspx












