SFTP public key Authentication user setup

[vhc23]

I was recently ask to setup a client to send file to our vshell SFTP server and the client wants to use a public key to authenticate using SSH. On the SFTP server side I'm not sure what else I need to do beside copying the pub key the client send me to the vendyke pub key location. I have added the user as I normally do but I don't see anything else where I need to check or change for this user to use the Pub Key authentication. Am I missing a step here?

Under the Authentication section in vshell the following are selected *password, public key, among a few others.

Thanks