Tried to follow the instructions here:

https://answers.laserfiche.com/questions/53691/Weblink-Log
https://support.laserfiche.com/forums.aspx?Link=viewtopic.php%3ft%3d16125%26amp
https://answers.laserfiche.com/questions/54336/Public-Accessing-WebLink-and-Licenses-Not-Timing-Out
https://answers.laserfiche.com/questions/53691/Weblink-Log

Their robots.txt file is in the 
c:\Program Files\Laserfiche\Weblink\ 
and 
c:\Program Files\Laserfiche\Weblink\Web Files\ 
directories

and this is what's in it.

User-agent: *
Disallow: /MyWebLink.aspx
Disallow: /Login.aspx
Disallow: /Search.aspx
Disallow: /
User-agent: AhrefsBot
Disallow: / 
<case match="(bot|spider)"> 
          crawler=true 
          tagwriter=System.Web.UI.HtmlTextWriter 
</case> 
<case match="AhrefsBot"> 
          browser=ahrefsbot
          crawler=true 
          tagwriter=System.Web.UI.HtmlTextWriter 
</case> 
<case match="+Googlebot"> 
          browser=googlebot
          crawler=true 
          tagwriter=System.Web.UI.HtmlTextWriter 
</case> 
 

From our IIS logs it looks like Googlebot and AhrefsBot are the bots accessing it.

Does anyone have any ideas? Thanks!