I understand that we can use LDAPS to secure user authentication between a WSA and LDAP server but how can I secure the authentication conversation between the client and the WSA? Is this possible?
Yes, though sometimes things get a little squirrely, your mileage may vary.
In the gui, go to Network/Authentication
Click on Edit Settings in the lower right, on the page that opens, in the middle there's an option for "Credential Encryption"
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