InfiniBox releases 4.0 and 4.0.1 introduce an issue with defining a user group for AD server with a default scheme value.
InfiniBox 4.0 and 4.0.1 set the value of the Group Name Attribute of the Active Directory repository type to group rather than to cn, as was in previous InfiniBox releases.
When InfiniBox queries the LDAP server, group is not found.
To work around this issue, change the value of Group Name Attribute to cn and retry the user group creation.
This issue will be fixed in InfiniBox 4.0.10.