OK, Its unfortunate that I did not get any help from the support community about this but the good news after several trials and many hours I was able to resolve it and Im sharing my experience to help those who might get stuck in the future regarding the same issue: 1- No need to set up any of the TLS properties if you are connecting to LDAP:// url and not LDAPS://. You can comment or remove this part. 3- Authentication Strategy: SIMPLE 2- Manager DN: if you are using windows open Active Directory Administrative Center (can be installed ). Do global search for one of the accounts you are familiar with and going to use, once located right click to select properties, scroll down to Extensions section and click Attribute Editor tab, locate the distinguishedName attribute and that will be the value to use in the Manager DN. It will be something like : CN=lastName.FirstName,OU=Standard Users,OU=Users,OU=LocationOU,OU=OrgName,OU=SomeOU,OU=AnotherOU,DC=DomainName,DC=com 3- Manager Password: the selected account password from above. 4-Url: The Ldap url, example : LDAP://ldap.DomainName.com/ 5- User Search Base: Use the Same string from Step 2 without the the account CN, Example: OU=Standard Users,OU=Users,OU=Location,OU=OrgName,OU=SomeOU,OU=AnotherOU,DC=DomainName,DC=com 6- User Search Filter: This is what you will use to add user and login to nifi. What worked for me is the "sAMAccountName={0}" which you can find set under the Attribute Editor (step 2) and it refers to search by the user name (example: lastname.firstname). 7- Identity Strategy: USE_USERNAME 8- Make sure to add the provider name (Example: ldap-provider) to nifi.properties. 9- Restart nifi. 10- using the default admin account created when setting up secure TLS on the installation server (Example: my_username) to add the AD user to Users and Set the Policies using user name from above. 11- From another machine launch nifi from the browser and you should be prompted to log in. Login using the same account credential you added to nifi and you should be in. Other helpful information can be found: https://pierrevillard.com/2017/01/24/integration-of-nifi-with-ldap/comment-page-1/ good luck.
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