Few times a day every day I get something hitting my site on urls like this:
/MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=6551&STRMVER=4&CAPREQ=0 /_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=6551&STRMVER=4&CAPREQ=0
The user agent is this: UserAgent Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.1; OfficeLiveConnector.1.3; OfficeLivePatch.0.0)
Looks like some sort of Microsoft bot? What its trying to do.
This is related to the Web Discussions Toolbar that comes with Office 2003 which is an add-in to Internet Explorer. IE is querying your site to see if it supports the extensions required to support this.
The only thing you can do to mitigate the problem is create /MSOffice/cltreq.asp as a zero length file on your server as this will be quicker to serve than a 404 page.
It's not a bot.
Your users have Microsoft Office installed, and the discussion bar turned on in IE. IE is querying the server to see whether it supports web discussions.
These requests are generated when someone browses your site with Internet Explorer's Discussion toolbar enabled. You can safely ignore these requests.
