Synology Setup with LDAP user

I’ve been trying to use an LDAP user to monitor several Synology NAS systems I have in this home. There is a valid LDAP server (one of the NAs’s) and I’ve created a used ID. But I can’t work out how to ‘parse’ the [email protected] (something like this) as the username for the ‘device’ setup for the NAs’s
Can this only be a local user ?