How to bulk invite and assign groups?

[Moin]

Did you try it with a non-trust-level group? I am not sure you can add someone to a trust-level group, because these are automatic groups. You could create a custom group that grants a specific trust level when the user is added.

Edit: found the Documentation

@Discourse

It is not possible to invite users to predefined groups such as, trust level groups, admin, mod or staff groups. As a work around, you can configure a custom group to automatically set a users trust level in the Effects section of the group’s configuration page. Doing this will allow you to set the trust level of invited users to a trust level other than what is set by your site’s default invitee trust level setting