vOneCloud Active Directory Integration

Community Support
3

i would try changing the username to UPN.

:user: 'user@domain.tld'

ldap

	# Ldap user able to query, if not set connects as anonymous. For
    # Active Directory append the domain name. Example:
    # Administrator@my.domain.com
    #:user: 'admin'
    #:password: 'password'

and leave encryption commented, not blank.
#:encryption: :simple_tls

here is an example you can try out