Hi,
If you receive this issue please log it with your support provider with the problem reference:
5924 - Web Access incorrectly detects IE 8/9/10/11 in Compatibility Mode as IE7
The following article goes through some of the ways to workaround this:
https://community.landesk.com/support/docs/DOC-31308
The easiest is to use an external URL such as comanyname.co.uk/servicedesk.webaccess. The URL can point to the local IP address internally.
Calvin