Delete users from a Site collection

Overview

A user might belongs to many user groups in a MOSS site collection. Below steps show how to remove users from all groups of a site collection.

Reference

Removing Selected Users in MOSS 2007/WSS v3

Steps

1. Select "Site Actions" -> "Site Settings"
2. Click "People and groups" under "Users and Permission"
3. In "People and Groups" page, click "All People"
4. Select the users you want to remove, then select "Actions" -> "Delete Users from Site collection"