Exchange witness server hardware requirements (Ram, CPU and Hard Drive)

Hi Guys,

Thanks for your replies. Please also guide on ReFS with Exchange 2016 server. When I try to create a mailbox-database, the Exchange shows a permissions warning message which is given below with a separate heading. It is also worth mentioning that the databases are created fine in the Exchange but I still need to know the root cause of this warning. Have anyone else have faced the same issue on REFS drives in Exchange 2016.

Error Description:

There was a problem creating directory "D:\Program Files\Microsoft\Exchange Server\V15\Mailbox\REFSDB01" on server "hostname.domain.com". In order to ensure that the Exchange data is kept secure, please create the directory, if it does not already exist, and configure directory permissions so that "SYSTEM" and the local "Administrators" group have "Full Control" for the folder, subfolders, and files. It is recomended that permission inheritance be broken so that only "SYSTEM" and "Administrators" have access to the directory.

I beleive there is not any specific requirements f regarding RAM/CPU etc. for Witness server so it can be created with minimum available resources.

Required information has been provided.