I'm aware of the REST API and have used it for some other functionality. I was just trying to avoid having to create a custom application if it could be done within the Okta UI. Since that's not currently possible I guess I'll have to create a small search application to do what I need.
Another idea, if the emails are sourced from, eg, AD, you could: 1. create a custom field, eg "domain", in the Okta user object 2. use UD to parse the AD email, just pull out the domain and save it to "domain" 3. search with the Users API
You misunderstood the question. I want to be able to search for partial matches on *ANY* email address - codix.gr was just an example. It's not practical to create a group for every email domain of every user in the Universal Driectory and keep them up-to-date.
As Gabriel stated above, wildcard searches/searching based on partial matches like you are describing are not something that can be performed in the Okta UI at this time. This would be a great candidate for a feature request, however.
To submit this as a feature request, you can do so by going to https://community.okta.com/ and then logging in and clicking on the "Ideas" button in the top-right hand corner of the page, and then select "Post Idea" on the next page. This will open a feature request for other members of the community, including our own Product Managers, to see and vote on.