Your customer requires you to provide a Cisco Unity voice mail only solution today, with a planned migration path to Unified Messaging in the next year. They have an existing Windows 2000 and Exchange 2000 configuration that supports 12,000 users. At this time they do not allow the Windows Active Directory schema to be modified.How can you best meet the customer requirements?

A.
Install two Cisco Unity servers in the existing Win2K domain and import the users.

B.
Install four Cisco Unity servers in the existing Win2K domain and import the users.

C.
Create a separate forest/domain with new servers provisioned for the 12,000 users and use the same Exchange alias naming convention.

D.
Create a separate forest/domain with new servers provisioned for the 12,000 users and use a separate Exchange alias naming convention so there are no overlapping GUID issues.