We are getting below error when open Template builder when opened using LDAP(Domain) accounts.

    The request failed with HTTP status 401: Unauthorized.
       at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
       at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
       at Tridion.ContentManager.Templating.CompoundTemplates.DomainModel.Proxy.CompoundTemplateWebService.Login(Boolean initData)
       at Tridion.ContentManager.Templating.CompoundTemplates.DomainModel.Model.Login(Uri contentManager, NetworkCredential credentials)
       at Tridion.ContentManager.UI.CompoundTemplateDesigner.DesignerForm.LogonAs(Uri uri, Exception initialError)


When we use local Admin account to connect it is working and able to open Template builder.

Has anyone faced similar issue.

Update--- When I updated Tridion/Templating(/templating/compoundtemplatewebservice.asmx) authentication from Windows Authentication to Anonymous it worked. Is it recommended to keep anonymous for Tridion/templating.

Update 2-- When a new user is added from LDAP to Tridion the user is able to login. Existing LDAP users template builder is not opening.