
User15754274409039659356 (Customer) asked a question.
Unable to connect to OKTA universal Directory using Apache Directory studio.
The authentication failed - [LDAP: error code 50 - You do not have permission to access the feature you are requesting : (Refer to Okta error Code E0000015)] javax.naming.NoPermissionException: [LDAP: error code 50 - You do not have permission to access the feature you are requesting : (Refer to Okta error Code E0000015)]

I hope you have enabled "LDAP Interface" to access OKTA UD. Also go through limitations of OKTA LDAP Interface.
https://help.okta.com/en/prod/Content/Topics/Directory/LDAP_Using_the_LDAP_Interface.htm