I'm trying to execute the "Call web service" action by using Web Url/_vti_bin/UserGroup.asmx web service but
I cannot populate the "Web Method" dropdownlist after clicking the "Refresh" button.
I keep getting the error "Request failed with status: Unauthorized." for a particaular user. But the same webservice works fine for
my credentials.
(Both users are site collection administrators in the same site and it was worked without error until yesterday).
It happens from today for several instances. When I run the workflow for the user who got error, workflow also gets error as below:
Failed to invoke web service. Error returned from server: The remote server returned an error: (401) Unauthorized.
What could be the reason?