samba - Apr 2014 - Possible to specify multuple ldap servers in ldap idmap backend or not?

Hi Samba experts,

Is the following valid? Both localhost and the "otherserver" have 
referrals to the master ldap server. It works perfectly with just 
"ldap://127.0.0.1" but I just need to check that the below will work
to
provide some resilience.

idmap config * : backend = ldap
idmap config * : range = 10000-20000
idmap config * : ldap_url     = "ldap://127.0.0.1/ 
ldap://otherserver.my.net"
idmap config * : ldap_base_dn = ou=idmap,dc=my,dc=net
idmap config * : ldap_user_dn = cn=manager,dc=my,dc=net

Thanks

Alex