Question 2 Replies 82 Views × Close popover Nick Montemayor (NickM591) Contra Costa County Contra Costa County US View Profile Send Message NickM591 Member since 2017 25 posts Contra Costa County Posted: October 9, 2018 Last activity: October 10, 2018 Posted: 9 Oct 2018 16:34 EDT Last activity: 10 Oct 2018 15:50 EDT Closed Solved ServiceClient on OpenSpan Toolbox Does anyone have encounter this problem below? We have a web service which is running fine when consuming from the browser, but when running on Pega Robotic Studio I get the error below. "The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Negotiate,NTLM' Thanks for the help in advance. Robotic Process Automation × Close popover Facebook Twitter Linkedin Email Copy Link Copied! Moderation Team has archived post, learn more × Close popover This thread is closed to future replies. Content and links will no longer be updated. If you have the same/similar Question, please write a new Question. Accepted Solution Posted: 2 years ago Posted: 10 Oct 2018 14:00 EDT × Close popover Nick Montemayor (NickM591) Contra Costa County Contra Costa County US View Profile Send Message NickM591 Contra Costa County replied to NickM591 I have this resolved by enabling Anonymous authentication on web service host site. Thanks. Posted: 2 years ago Posted: 10 Oct 2018 15:50 EDT × Close popover Mitchell Vega (Mitchell) PEGA Software Engineer Pegasystems Inc. US View Profile Send Message Mitchell PEGA replied to NickM591 I'm glad you got it. NTLM authentication isn't supported by the Service Client component unfortunately which is why you experienced this error.