Just as an FYI I have two Gmail accounts running under Outlook, but am only syncing the Contacts from one of the two to Outlook Contacts/Address Book. I can use the synchronized contacts in Outlook Contacts/Address Book when composing new messages from either account.
And I just added a contact on the Google side that I know was brand new. After I ran the sync it was in Outlook Contacts/Address Book and able to be used for new email messages no matter which account has focus when I start a new message.
Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041
The purpose of education is not to validate ignorance but to overcome it.