Your company has offices in New York and Montreal. Each office is configured as an Active Directory site.

You have an Exchange Server 2010 Service Pack 1 (SP1) organization. The organization contains five servers. The servers are configured as shown in the following table.

Each Mailbox server contains two mailbox databases. All users have a mailbox on their local Mailbox server.

Server3 contains a public folder database.
You create a new public folder database on Server4.

You need to ensure that all new public folders created by users are created on Server4.

What should you modify?