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
Blog Post
TonyBrock - The "Tier Ratio" logic was moved upstream in the calculations. The calculator needs to determine the number of databases based upon two independent calculations; the number of mailboxes based on size and the number based on IOPs. The ratio of those values is now incorporated into the calculation of how many users a given database can hold. The calculator will recommend the number of users per database that represents the smallest number of users a database can hold based upon IOPs or mailbox size, i.e. the constraint. In those calculations, the IOPS and size ratios are assumed to be evenly spread across the database. Once the number of mailboxes per database is known, then the number of databases required count follows.