I am using {Web URL}/_vti_bin/usergroup.asmx and AddUserToGroup to added user to the group in workflow using web service, the user is added successfully to the group. But when I check the permission of the added user, the user doesn't inherit the permission of the group. The group that I added is having edit permission. But if I add the manually the user inherits the permission of the group.
Solved! Go to Solution.
Found the issue, when the user added with domain name like "<domainname>\<username>" , it does not work.
But when added with claim based tokens ("i:0#w|<domainname>\<username>") it worked. SharePoint is considering the above two as two different users.