Compare the current AD USN with DIP’s saved AD USN position. Distinguish OID change numbers and verify unapplied updates using account values and logs.
Active Directory USN Gaps: Check Before Assuming Missing Updates Read Post »
Why only some AD users can log in to OBIEE 12c or OAS (User/Group Base DN, sAMAccountName attributes and filters), and how to check the settings with ldapsearch and fix them.
OBIEE and OAS with Active Directory: When Only Some Users Can Log In Read Post »
Data In Hands · Real Support Case Notes How To: When AD users sign in fast but only “weblogic” takes
OAS Sign-In Delays: When AD Users Are Fast but weblogic Is Slow Read Post »