RingCentral Inc. shares fell more than 6% in the extended session Tuesday after the cloud-based communications company reported fourth-quarter earnings largely in line with Wall Street expectations, but its sales guidance for the year and for the current quarter fell short. RingCentral RNG, +0.72% lost $47 million, or 50 cents a share, in the fourth quarter, compared with a loss of $284 million, or $2.97 a share, in the same period last year. Adjusted for one-item items, the cloud-based communications ...