RingCentral (RNG) shares have declined 18.3% year to date compared with the Zacks Computer & Technology sector's rise of 12.6%. The underperformance can be attributed to the challenging macroeconomic conditions, unfavorable forex and stiff competition. However, RingCentral's expanding partner base is expected to boost its prospects. It recently partnered with Zayo, a major communications infrastructure provider, to launch Zayo UC+ with RingCentral. This new offering integrates RingCentral's AI-driven, cloud ...