The port number can be set in the Connection settings located in the Admin tab.
Steps to change the port number:
Click the Admin tab.
Go to General Settings > Connection.
Under Connection Type, enter the new port number in the HTTP field.
If you'd like to enable the Secure Sockets Layer (SSL) for specific domains, select the Enable LDAP SSL foroption and choose the appropriate domains.
You can also set the expiration time for each session using the Session Expiry Time option.
Click Save Changes.
Restart ADManager Plus for these changes to take effect.