delaying invitations & permissions question

is it possible to upload users w/o automatically generating invitations & passwords?

we are using AO for the first time and have 100 users we want to invite-- we want to enter user details THEN invite but it looks like if we drop in email addys, it does this at once?

also, do you have to invite each user to each content section?  we have a group of 100 and 8 modules-- does this mean we need to send out 8 separate invitations?

tks!

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