Running AD and Domain Prep for Exchange 2010

Another question:
When installing and configuring my new Ex2010 roles/servers (before mailbox migration) will the end user be impacted (how long for), and how long if any is email transmission affected?

will client email transmission be affected or impacted whilst running preparation commands?

no; this is an AD operation (schema extension) and not exchange-specific

are these tasks transparent to the user?

yes

will the end user be impacted

there should be no impact during the installation
it's when you start moving mailboxes, changing hub connectors, etc. where there could be an impact

This is a single isolated domain, 2 x Win 2k3 DCs and 2 x Win 2k12, all are Global Catalog servers.
There is a single Ex2003 and I've built a number of Ex2010 servers so once Ex Roles & Services are configured they will all coexist.
Should I run the Schema/AD/Domain tasks whilst logged onto one of the 2012 DCs? as it is a 64-bit system?

You need to run this on the DC that is holding the Schema Master Role. You will also need to be a member of the Schema Admins group as well, to perform this task.

Will.

Hi,

Make sure the user account which you're using that has the schema admin role & Enterprise Admin permissions. The functional level should be raised to 2000 native. Also important info during the mailbox move from exchange 2003 to 2010. Users will be unable to access their mailbox from Exchange 2003.

Thanks
Manikandan

Thanks