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As per my Knowledge it does support
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Question is I know Exchange 2016 supports cloud witness leveraging MS Azure but does IPless DAG also support this cloud witness capability or will the DAG need an IP. I would like to setup an IPless DAG since this is MS recommended architecture, but I'm not sure if it supports the cloud witness instead of an on prem witness.
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Question is I know Exchange 2016 supports cloud witness leveraging MS Azure but does IPless DAG also support this cloud witness capability or will the DAG need an IP. I would like to setup an IPless DAG since this is MS recommended architecture, but I'm not sure if it supports the cloud witness instead of an on prem witness.

Exchange 2016 IPless DAG

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Microsoft Azure is a cloud computing platform and infrastructure for building, deploying and managing applications and services through datacenters. It provides both platform-as-a-service (PaaS) and infrastructure-as-a-service (IaaS) services and supports many different programming languages, tools and frameworks, including both Microsoft-specific and third-party software and systems. Cloud Services is a PaaS environment and can be used to create scalable applications and services; there are specific software development kits (SDKs) provided by Microsoft for Python, Java, Node.js and .NET. Azure also has file and storage services, data management, analytics and DNS services.