Gettings started with Aliases|OPC UA Standard|Forum|OPC Foundation

I'm hoping to get some hints on how to get started implementing the FindAlias method on a server. I've been reading through the OPC Foundation documentation, but it's still not completely clear to me as to what I need to do.

Our server supports Data Access and a few events. However, so far it has no methods. I'm not familiar with the steps needed to add support for methods, so I might be asking something here that is quite basic.

I notice that our server has been automatically allocated an Aliases folder (node id =23470) and Locations folder (node id =31915) within namespace index 0 directly under the Objects folder. The Aliases node has a FindAlias method. When I execute Call on this method I see an error message, "Call failed with status 'BadNotImplemented'"

I'd be grateful for any hints on what to do next.