nstalling Discovery Accelerator 10 on the same server running Enterprise Vault 10

Since we never used Discovery Accelerator, I uninstalled it  before  upgrading  EV 9 to EV 10. When we were at 2007 and 8  DA was running on the same server as  Enterprise Vault and we never had problems running test cases.  We were and still are only manging 400 mailboxes.

Now a situation comes up where we are probably going to need DA.  The version 10 documentation strongly recommends  installing DA on a separate server.  Because we were able to run DA  and EV way back when on one server, my boss wants to do the same thing with it now.

With that small amount of mailboxes can I get away with runing DA 10 on my EV10 server?

Thanks.