CAS 2013 and CAS 2016/2019 compatibility

Raul Guchinife 100 Reputation points
2023-03-09T09:28:39.5033333+00:00

Hello everyone

In my organization I currently have two mail servers with Exchange 2013. One of them with the CAS role and the other server with the Mailbox ROLE.

The CAS server is receiving brute force attacks and we have thought about using software to stop these attacks, but it requires the CAS server to be an Exchange 2016 or 2019

Can an Exchange 2016/2019 server be added to the current organization to play the role of CAS while keeping the other servers? They are compatible? If so, I would appreciate some documentation about it with the steps to follow to be able to add this server.

Thank you

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Accepted answer
  1. Xuyan Ding - MSFT 7,561 Reputation points
    2023-03-10T09:47:57.8066667+00:00

    Hi @Raul Guchinife,

    Just to clarify in advance, the Client Access role in Exchange 2016 and Exchange 2019 has been integrated with the Mailbox server role and does not need to be installed separately.

    You can add new servers to an existing organization to deploy a hybrid environment.

    Please check out the two articles below: Installing Exchange Server 2016 into an Existing Organization.

    How to Configure Client Access Services on Exchange Server 2016 or 2019?

    Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.


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