no, we don't have any built in search on custom profile fields. That would require custom development it isn't something we could bake in. The way the custom profile properties are stored in a separate table as key value pairs makes it difficult to have any generic query on those in any efficient way. It would require very specific sql to do it efficiently which would mean knowing what the properties are in advance. In other words its difficult to provide built in efficient search on arbitrary data properties.

It should be fine to search those fields in a custom solution.

Search by admins already searches email and loginName. The coming release will also search FirstName and LastName when an admin is the one doing the searching. The coming release will also allow toggling the sort between displayname (the Name field) and created date so it is easier to find new users.

Best,

Joe