Currently, the web hosting for my company manages everything, including the website, email service and the domain.
I am planning a migration of email service to google app, step by step. I've opened an account in google app for my company's domain and will recreate all email accounts in google app. Then I will ask the web hosting to change the domain record to point to the mx server of google app.
All users in my company already have their outlook/outlook express setup to download emails. If I do the steps mentioned above, is this a must that they need to change the mail server setting in the outlook?