This article addresses the following error message that appears when logging in using SFTP protocol and LDAP credentials:
Authentication with public "key "Imported-openssh-key". Server refused public-key signature despite accepting key!
This can occur due to the following reasons:
When the user being authenticated passes the public key as Serv-U cannot use the public key as the connection account. The connection account requires a password with an account name complete with UPN suffix.
Provide correct Connection Account and Connection Account password for LDAP host in LDAP configuration. Otherwise, Serv-U will use the credentials that are being authenticated as the connection account.