Lotus Notes easily works with Microsoft Exchange Outlook, which is used by many businesses. This means easy compatibility with iNotes. iNotes is also targeting business customers that want to eventually move to cloud, but want to do it in a less dramatic fashion than what Google offers. Basically, the service is a hybrid between full cloud service and on-premise work. iNotes can be used if you want to completely move your email to cloud, or just partially.
Essentially, the thought behind iNotes is to move an enterprise email system in the cloud arena. The hope behind this is to free up

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under-staffed or just over-loaded IT departments and allow them to free up some time.
Google has 25 gigs of space while iNotes only has 1 gig. Both of these programs can be accessed from a landline computer or your mobile device.
IBM’s entrance into the cloud game just makes the latest contender in the game. Many companies have been bumbling into this arena with mixed results and sometimes no success at all.