Aside from the documentation here in ExL, we also have consultants who would love to work with you to set up any type of business need you have. You can reach out to your AE if interested and they can give you the details.
Hi Ross, You can see when a user was created using User 'Entry Date'. You can see this field in a User Report in a column, for example. Would that fulfill your use-case? I hope this helps!
If you can find the intended result via the 'advanced search', but not the regular search, please submit a support ticket so we can assist in re-indexing the search function of your instance.