People who already have an account in Matrix can also be found by their display name (usually "first name last name"). Please wait 5 seconds after each last entered character until the search results are displayed. Persons who have not yet logged in can only be found via their e-mail address or their Username. The link button "Show More" will display further search results. Please also note on which server your searched person is displayed.
Inserting e-mail addresses (e.g. via Ctrl+V) is not enough to find people! Please enter the characters of the e-mail address by hand, character by character and wait 5 seconds until the hits are displayed.
For the mass invitation of persons (up to 100 at once, then repeatable) the matrix names are necessary, which should be in the form @username:envs.net. Collect them e.g. in a text editor line by line and then paste them into the search field in Matrix/Element using the clipboard (copy & paste).
If you cannot find anyone, ask for their username or share their username (`@username:envs.net`) or `https://matrix.to/#/@username:envs.net`, so that the person addressed can contact you within Matrix.
The conversation opens, which can begin after the connected person accepts the invitation [end-to-end encrypted](/encryption/) (meanwhile standard). The connection to the server at envs.net is of course also transport-encrypted. If you explicitly do not want end-to-end encryption for a special reason, an unencrypted room and invite the conversation partners to it.