By Nivedita Balu and Jane Lanhee Lee (Reuters) -Microsoft Corp on Tuesday hit Wall Street targets for cloud services revenue, but that was not enough for some of the most optimistic investors and shares fell 4% in extended trade. Investors are seeking assurances that the enterprise cloud business is still growing strongly and will also scrutinize upcoming financial reports from Microsoft rivals Amazon and Google. Total Microsoft revenue for the second quarter beat expectations but the outperformance did not flow through to the Azure cloud service. Azure revenue growth of 46% was in line with a…