When trying to Configure LDAP in the Web Portal, please collect the three screenshots as below:
1. Screenshot from LDAP Administrator (figure 1):
(you will noticed that the value of "distinguishedName" will be the content place into "Group" field in "Group assignment" screen)
2. Configure LDAP - Connection screen:
NOTE: the information next to "Local Servers" in figure 1 will be used for the URL or Domain Name in the Configure LDAP Connection window (figure 2).
Make sure use: LDAP://domain:port
3. Configure LDAP - Group Assignment screen:
NOTE: the value of "distinguishedName" (figure 1) will be the data to place into the "Group" field in the Configure LDAP - "Group assignment" screen (figure 3).