Expense Management Software Market Size, Share & Industry Analysis, By Type (Telecom/Mobile Expense Management and Cloud Expense Management (SaaS/UCaaS, IaaS, and PaaS)), By Function (Dispute Management, Invoice and Contract Management, Ordering and Provisioning Management, Sourcing Management, Inventory Management, Usage Management, and Others), By Enterprise Size (Large Enterprise and Small and Medium-sized Enterprise), By End-use Industry (BFSI, Goods de consommation et vente au détail, fabrication, informatique et télécommunications, soins de santé, médias et divertissements, et autres