Forum Discussion
Blade1966
Oct 10, 2019Copper Contributor
Exchange 2019 memory requirements
Hi, I planned to install Exchange 2019 on our infrastructure (400 mailboxes), but memory requirements are 128 GB of RAM!! Is it mandatory or can we install it with less memory (32 GB)? Is someone ins...
Dan_Snape
Oct 18, 2019Bronze Contributor
Blade1966Surely that's a error! It would be crazy if the minimum memory requirement to host mailboxes is 128GB. In Exchange Server 2016 the recommended maximum is 192GB.
Neill
Oct 18, 2019Brass Contributor
No error.
See this - https://docs.microsoft.com/en-us/exchange/plan-and-deploy/system-requirements?view=exchserver-2019
Mailbox: 128 GB minimum recommended. Exchange 2019 has large memory support (up to 256 GB)
Remember MS are using physical servers to run Exchange online which are presumably coming with at least 128GB RAM. They probably aren't bothering to test anything smaller.