8.5 in mixed environment

I have a situation where it is not possible to upgrade admin server to 8.5 yet…

Is it possible to add an 8.5 server to a 6.5 Domain (6.5. address book), and NOT upgrade the address book?

Thanks in advance.

Subject: Sure, but some new features in 8.5 might not be usable/configurable until you upgrade the Domino Directory

What do you want to start using in 8.5 that is motivating you to upgrade just a single server. What is keeping your from upgrading the admin server?

jpaganet@us.ibm.com