RingCentral Sees Q3 Adj. EPS $0.18-$0.20 vs $0.18 Est., Sales $220M-$222M vs $219.68M Est.; Raises FY19 Adj. EPS Guidance From $0.71-$0.75 To $0.77-$0.79 vs $0.73 Est., Raises Sales Guidance From $862M-$866M To $874M-$877M vs $864.19M Est.