One of the things about Exchange 2010 that many of my customers find very attractive (and I have to agree with them) is the idea of the multi-role or “all-in-one” DAG server. This means having all ...
Updated Jul 01, 2019
Version 2.0
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Mixing physical and virtual servers in a DAG is possible and supported. The physical server and virtual server in this case do not need to be identical (not CPU, disk, RAM, etc.).
What you must keep in mind is that if there is a failure scenario of some sort, the virtual machine must be engineered to support the load expected of it. In other words, if you have a two-node DAG with one physical and one virtual, and the physical server requires 16 cores, then the virtual machine which is limited to 4 or possibly 8 cores will probably not support the necessary load in a failure scenario.
What you must keep in mind is that if there is a failure scenario of some sort, the virtual machine must be engineered to support the load expected of it. In other words, if you have a two-node DAG with one physical and one virtual, and the physical server requires 16 cores, then the virtual machine which is limited to 4 or possibly 8 cores will probably not support the necessary load in a failure scenario.