> ## Documentation Index
> Fetch the complete documentation index at: https://docs.box.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Creating an Information Barrier User Segment

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An information barrier must exist before you can add segments to it. Segments contain one or more managed users, and no managed user can belong to more than one segment.

1. Go to **Admin Console > Shield**.
2. Click the **Information Barrier** tab.
3. Click **Edit**. (If you do not see an information barrier, [create one](/en/box-shield/shield-information-barrier/creating-an-information-barrier) first).
4. Click **Add Segment**. (You can add up to 10 segments. If the information barrier already contains 10 segments, the **Add Segment** option is unavailable).
5. Enter a segment name and an optional description. (A description is recommended to help clarify the segment’s context and purpose).
6. Click **Save**.
7. Click **Manage items** in the segment you just created.
8. Select and upload a CSV (comma-separated values) file containing a list of users.
   * If you do not already have a file with user or Hub IDs, click **Download CSV of existing data** and add users or Hub IDs to that file.
     * To find Hub IDs, navigate to **Admin Console > Reports > Create > Box Hubs**. This report contains all Hub IDs.
   * As the file uploads, it is checked for conflicts with other segments (segments cannot contain users or Hubs that already exist in another segment).
9. Select **Add**.
10. Review the results of the conflict check. If there are no conflicts, or if you are satisfied with the resolution, click **Save**. Otherwise, click **Start Over**.

<Note>
  **Notes:**

  * When a user in an enabled or pending barrier segment creates a Hub, that Hub is automatically added to the same segment.
  * When adding a user to a Hub that belongs to a segment, the user must not be restricted from that segment or belong to another segment. If the user is restricted by the information barrier, a message displays and prevents them from being added to the Hub.
  * A column showing the number of Hubs in each segment appears on the segment information page and on the final information barrier review page.
</Note>