For me the reason is integration: Calendar invites, Google Docs "shares", and other permissions grants don't forward, so they always end up tied to the Google Apps account. Which means using it as a primary account, gives one a better more integrated experience.
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For me the reason is integration: Calendar invites, Google Docs "shares", and other permissions grants don't forward, so they always end up tied to the Google Apps account. Which means using it as a primary account, gives one a better more integrated experience.
You can add secondary (non-Google) e-mail addresses to a Google account, which should then all be associated with the same calendar.