The iPhone is making progress in the enterprise, but is poised to make substantial gains in the near future, according to a research note released this week.

There is still much debate over how well the iPhone fits in wing tips, but one thing is clear: the handset is arriving at the office and isn't clocking out anytime soon.

"There is growing evidence that the iPhone is making inroads into the enterprise. Although Apple has a relatively small position today, we expect it to gain considerable share in the enterprise over the next several years," said Chris Whitmore, the Deutsche Bank analyst and author of the Enterprise Edge research note.

He estimates that Apple will ship 2 million iPhones to corporate accounts this year, either purchased by internal IT staff or through formal reimbursement policies. That 2 million gives Apple about 7 percent of the enterprise smartphone market, up from 2 percent in 2008.

Research In Motion, (NASDAQ: RIMM) has 60 percent, according to Whitmore, while Microsoft's Windows Mobile phones check in with 20 percent enterprise marketshare.

However, he sees the exploding iPhone app sector as a sign of good things to come Apple's way.

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