Set up IMAP and change your SMTP settings to read Gmail messages in other mail clients, like Microsoft Outlook and Apple Mail. Otherwise click Tools > Accounts > Add Account from the Apple Menu bar. If you see a Welcome to Outlook screen, click Add Account.
If you have just installed Outlook 2011 it will show in your Dock. I have a personal Gmail account and a business Gmail account It's obviously the settings for the SMTP (that's what's used for sending).
Can't send email from Outlook for Mac 2011 via Gmail Business Account I am using Outlook for Mac 2011.