I just installed 2 new Exchange 2010 SP2 RU8 servers in Co-Existence with my existing Exchange 2003 environment. Following a great guide So far so good. I just ran into a small (I hope) hiccup and have a few questions:
In testing the creation of a new mailbox on EX2010 i am only presented with my internal AD name for the @ part i.e. my only option is @rds.contoso.com (AD ROOT) but we use @contoso.com. In EX2003 we have all domain variations listed and created for each user listed and default it to @contoso.com for new users. Is there a configuration i have to perform to get those to come over to EX2010?
****Also the other domain variations are listed under Accepted Domains****
1. I am using a new public name for access for example we currently use webmail.contoso.com to access OWA/ActiveSync/RPC but i have all the CAS services publicly pointing to mail.contoso.com Since we are a fairly small business (75 users) i can easily direct folks to the new mail.contoso.com once i move this mailbox to the new exchange server. Is there any need to setup Legacy redirect then?
2. If i only have 1 CAS 1 HUB and 1 MB do i still need to setup CAS array in active directory or can i wait until i deploy to our Branch Office?
3. If i do have to perform the CAS array setup now will that impact existing RPC client connecting to the EX2003 frontend server?