Is this possible to login into the SharePoint site using the username and password from web service soap header?
SharePoint Stack Exchange is a question and answer site for SharePoint enthusiasts. It only takes a minute to sign up.Sign up to join this community
If your SharePoint site is using FBA, you can use authentication.asmx webservice to get the authentication cookie. If your site is using Windows, you can directly assign defaultcredentials of logged in user like :
proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;