hi,
in our forum, there is no button for inviting users in user profile page or topic pages (even for TL2 users and above) .
this button is only visible to admins and moderators.
I couldn’t find any setting to tune this in admin panel.
in our forum the “must approve user” is active. is it the reason for invisibility of invite button?
Yes, if you have approvals on, users won’t be able to send invites, because they would bypass approval.
Thanks for the answer.
Is there any way to keep the forum somehow closed, meanwhile let trusted users to increase users?
I mean, I’d rather the growth in our forum happen based on the community who has been already formed. does anyone have any suggestion for it?
Does disabling approval, but enabling invite only suit your use case?
It was already the case 
then we needed another tool which enable strangers to ask for an invitation if they fit the community! and we switch to the current setting.
Is it possible to have the invite button even if newbie approval is active? I mean as a feature-request in the app.
as the invite button is only active for TL2 and more, and so it’s somehow like approval by trusted users of the community.
it seems that even inviting existing users to topics and messages is gone for other users.
and this make it little bit hard, is it possible to at least have the inviting function for existing users, in this case?
你好！
我们非常希望即使启用了新用户验证功能，也能为用户提供邀请功能。了解推荐新用户加入平台的老用户，对于验证过程来说是非常有价值的信息。
目前这似乎无法实现，对吗？
我们要么启用验证，要么启用邀请，但不能同时使用两者？
我想确实如此，不过我觉得我们或许可以在审批流程中统一这两者。我知道 @sam 正计划对邀请码进行一些工作，也许可以将这些整合在一起？
此行为自此已更改。即使需要批准新用户，普通成员也可以邀请他人，而无需绕过批准流程。