Blog Post

Exchange Team Blog
4 MIN READ

Announcing The Exchange Server 2019 Sizing Calculator

The_Exchange_Team's avatar
The_Exchange_Team
Icon for Microsoft rankMicrosoft
May 24, 2019
The Exchange team is pleased to announce that the Exchange 2019 Sizing Calculator has completed development.  We have heard the community since the release of Exchange Server 2019 and have spent the ...
Updated Jul 01, 2019
Version 4.0
announcements
exchange 2019
on premises
Planning and Architecture
tools
Fernando Gualano's avatar
Fernando Gualano
Copper Contributor
Feb 22, 2023

HI everyone!

I'm currently using 10.6 version of calculator dedicated to Exchange Server 2019 and I have an issue with number of mailboxes:

 

Set "Total Numer of Tier-1 User Mailbox": 10  -->  For test purpose only

Set "Total Send/Receive Capability / Mailbox / Day": 50 messages

Set "Average Message Size (KB)": 340

Set "Initial Mailbox Size (MB)": 500

Set: "Mailbox Size Limit (MB)": 4096

HA Deployment / Site Resilent Deploymet / Active/Passive / 1 DAG / 4 Mailbox Server (Primary Datacenter) / 2 Mailbox Server (Secondary Datacenter) 

 

Volume Requirements tab now shows: 340 mailboxes/database and 8 databases. This is 2720 mailboxes. How is this possible when "Projected Mailbox Number Growth Percentage" is set to 0%?

 

If I change "Total Numer of Tier-1 User Mailbox" from 10 to 100, I get the same result: 340 mailboxes/database and 8 databases

 

What am I missing? I had read similar issue in this thread. Or was this issue never resolved? Thanks!!