What is the minimum number of Hub Transport rules you should create?

Your company has offices in New York, Tokyo, and London. Each office is configured as an
Active Directory site. Each site contains one Hub Transport server.
You need to apply a disclaimer to all of the email messages sent by all of the users.
What is the minimum number of Hub Transport rules you should create?

A.
1

B.
2

C.
3

D.
9

Explanation:
Transport Rule Replication
Transport rules configured on Hub Transport servers are applied to all messages handled by
the Hub Transport servers in the Exchange 2010 organization. When a transport rule is
created or an existing transport rule is modified or deleted on one Hub Transport server, the
change is replicated to all Active Directory domain controllers in the organization. All the Hub
Transport servers in the organization then read the new configuration from the Active
Directory servers and apply the new or modified transport rules. By replicating transport

rules across the organization, Exchange 2010 enables you to apply a consistent set of rules
across the organization.
Understanding How Transport Rules Are Applied