Hello, I am going to be migrating Exchange next month so I am planning it out right now. Due to hardware/budget constraints, I am going to have to do 2 migrations to get this rolling the way we want. Right now we have a Front/Backend solution. I am going to have to temporarily move all mailboxes to another interim server in order to free up the existing backend server, and then I will be building an Active/Passive cluster with a frontend server. I have done a few Exchange migrations in the past, but I have never added an A/P cluster to an organization.
So my questions are:
1. Should I dump/disable the frontend server portion during the migration in order to make this process a little simpler?
2. Are there any guidelines/manauls out there that describe the necessary steps to add an A/P cluster to an existing Exchange Organization.
To add a little more fun to this project, we also use Unity and Call Manager.