Seats

 
 ## How seats affect new users
 
-When a new person is placed in an organization (by a routing rule on the [Identity and access](/docs/government/tenant-admin/identity-and-access) page), they're automatically given a seat if one is free. Tiers are filled in a fixed order, so the first tier is filled before the next is started. If every tier the organization has is completely full, the new person is placed in the organization without a seat. They can sign in and see the portal, but cannot send messages to Claude until an owner assigns them a seat or you distribute more seats here.
+When a new person is placed in an organization (by a routing rule on the [Identity and access](/docs/government/tenant-admin/identity-and-access) page), they're automatically given a seat if one is free. Tiers are filled in a fixed order, so the first tier is filled before the next is started. If every tier the organization has is completely full, or the organization has no seats distributed to it yet, the new person is placed in the organization without a seat. They can sign in and see the portal, but cannot send messages to Claude until someone gives them a seat tier. An organization owner can do that on the organization's Users page, and so can you from the organization's admin view.
 
-An organization that has no seat allocation at all is treated as uncapped. New users can join and use Claude, but this is unusual; normally every active organization has at least one tier allocated.
+The first seats you give an organization are also used for the people already in it. If nobody in the organization holds a seat when you save its first allocation, members without a seat tier are seated automatically from those seats, Primary Owners first. This covers an organization that was created with only a Primary Owner and given seats afterwards. Anyone the new seats do not cover stays without a seat tier until an owner assigns one. Later changes to an allocation do not repeat this. They add or remove free seats for new arrivals and for the organization's owners to assign, and directory-provisioned users with a group-to-tier mapping are seated from the added seats on the next sync.
 
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