Hi Rajesh. Here is a sample payload to add a User to a AD group.
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsdl="http://tews6/wsdl">
<soapenv:Header/>
<soapenv:Body>
<wsdl:TaskContext>
<wsdl:admin_id>imadmin</wsdl:admin_id>
<wsdl:admin_password>test</wsdl:admin_password>
</wsdl:TaskContext>
<wsdl:ModifyActiveDirectoryGroup>
<wsdl:ModifyActiveDirectoryGroupSearch>
<wsdl:Subject>
<wsdl:UniqueName>ADSGroup=ithas01-adgrp1,ADSContainer=Builtin,EndPoint=imwad2016a,Namespace=ActiveDirectory,Domain=im,Server=Server</wsdl:UniqueName>
</wsdl:Subject>
</wsdl:ModifyActiveDirectoryGroupSearch>
<wsdl:ModifyActiveDirectoryGroupActiveDirectoryGroupMemberOfTab>
<wsdl:memberOf>
{"expiryDate":"2017-09-30T15:00:00","memberOf":"ADSGroup=itcgroup,ADSContainer=Users,EndPoint=imwad2016a,Namespace=ActiveDirectory,Domain=im,Server=Server"}
</wsdl:memberOf>
</wsdl:ModifyActiveDirectoryGroupActiveDirectoryGroupMemberOfTab>
</wsdl:ModifyActiveDirectoryGroup>
</soapenv:Body>
</soapenv:Envelope>