Re: Mac alternative to MS Outlook

The reasons not to use mail or other client (besides mobile):

Consistency and cutting down IT needs.

There are bugs with mail/google apps integration, and if your company does a lot of shared calendars etc that doesn't work super well with iCal. It's so much simpler just to support the web platform and not worry about all the glitchiness of clients.

When we were researching google apps as an option, most people said the transition away from exchange was much much smoother if they boycotted client setups. People soon didn't miss their Outlook integration etc when they jumped all in on google apps.