Microsoft employs over 110,000 people in offices all over the world. Managing that many people leads to a lot bureaucracy. That's the most frequent complaint from employees posting to Glassdoor.
"Very complex, extremely large organization that is often challenging to navigate, but to be expected for a company of that size," explains one employee.
Another says, "Complex business with complex processes. Lack of communication/integration among different business units. Slow to respond to market, although that's been improving."