Not a PowerShell script, but would the Log Parser 2.2. utility work here? Download here: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=24659 It is pretty simplistic, but here is the Powershell command/script that I created to parse out unwanted lines from an IIS log file "select-string -path iislogfile.log -pattern gsa-crawler, 146.189.1.2 -notmatch | ForEach-Object {$_.Line}". We needed this command because our Webtrends web analytics product is licensed by page view count and Google Search Appliance (GSA) causes real page views that falsely count towards our licensed page view count and Webtrends Support told us to "parse out the GSA crawler lines".

Not a PowerShell script, but would the <a href="http://searchwindowsserver.techtarget.com/tutorial/How-to-use-the-IIS-Diagnostics-Toolkits-Log-Parser-22-utility">Log Parser 2.2. utility</a> work here? Download here: <a href="http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=24659">http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=24659</a> It is pretty simplistic, but here is the Powershell command/script that I created to parse out unwanted lines from an IIS log file "select-string -path iislogfile.log -pattern gsa-crawler, 146.189.1.2 -notmatch | ForEach-Object {$_.Line}". We needed this command because our Webtrends web analytics product is licensed by page view count and Google Search Appliance (GSA) causes real page views that falsely count towards our licensed page view count and Webtrends Support told us to "parse out the GSA crawler lines".