Dear all. There is a web application that I wanna it to authenticate users using LDAP in another server. How can I make this? But I don't want to make my own custom membership provider.

try this entry in your web.config file, put the relevant values in the various tags like server etc. <membership defaultProvider="LDAPMembership"> <providers> <add name="LDAPMembership" type="Microsoft.Office.Server.Security.LDAPMembershipProvider,Microsoft.Office.Server, Version=12.0.0.0, Culture=neutral,PublicKeyToken=71E9BCE111E9429C" server="Contoso1" port="50000" useSSL="false" userDNAttribute="distinguishedName" userNameAttribute="cn" userContainer="CN=Users,OU=Support,O=Contoso,C=US" userObjectClass="user" userFilter="(ObjectClass=user)" scope="Subtree" otherRequiredUserAttributes="sn,givenname,cn" /> </providers> </membership> details: http://technet.microsoft.com/en-us/library/cc197251(office.12).aspxManish Sati