Forum Discussion
HTTP request from Exchange server
Microsoft Exchange Server 2016 Cumulative Edition 15.1.1531.3 I observed a HTTP request from the server to a web site URL on port 80, with user agent Mozilla. Though Mozilla has never been installed...
That's expected, to provide a more or less standard user agent string to inform the service or server on the client being used (IE desktop, mobile), specifying application type, OS, vendor/version, etc. through the user agent. 'Mozilla' indicates the client is Mozilla compatible. Some services drop the request - purposely - when empty user agent strings are provided (we all know the redirects to 'use browser X to view this page).