After installing G Suite Sync for Microsoft® Outlook® (GSSMO), you can use Outlook to access either your G Suite account, or the previous account you're switching from. (The data in each account is kept totally separate.) Each time you start Outlook, you're prompted to choose the profile for whichever account you want to open.
When you no longer need access to your previous account, however, you can have Outlook open your G Suite profile automatically, without prompting you to select it from a dialog:
- Go to your Windows Control Panel > Mail settings, and click Show Profiles.
- In the dialog that opens, select Always use this profile, specifying your G Suite profile in the list below.
The next time you start Outlook, your G Suite profile opens directly.
If you later want to access another profile (such as for your old Microsoft Exchange account), go back to your Control Panel > Mail settings and change the setting back to "Prompt for a profile to use." The next time you start Outlook, you'll be prompted to open whichever profile you want to use.