The Exchange team today published an update for the Exchange 2013 Server Role Requirements Calculator as well. The new version number is 7.8. This version incorporates sizing for Exchange 2016 as well and includes support for ReFS (default for Exchange 2016). The version number is also dropped from the calculator.

More or less complementary to the calculator is the updated sizing guidance for Exchange 2016, which was also published today here. No big changes here, apart from multi-role only option and a slight increase in CPU requirements to cover for unforeseen circumstances as the team is still learning from real-world behavior. This makes sense, looking at the speed in which the calculator was released compared to the one for Exchange 2013. Kudos to the Exchange team!

New and enhanced functionality since version 7.6:

• Added support for Exchange 2016
• Included CPU utilization guidance changes for Exchange 2016
• Diskpart.ps1 and CreateDAG.ps1 now support ReFS
• Moved DataMoveReplicationConstraint setting from CreateMBDatabases.ps1 to CreateMBDatabaseCopies.ps1
• Revised all of the Distribution dialog controls to load their defaults from variables rather than use hard-coded values
• The DAG name from the Input tab now flows through as the default on the Export DAG dialog
• Updated Distribution tab dialog controls to persist the global catalog value during a session
• Added conditional formatting for ReplayLagTime and SafetyNetThreshold
• Removed 2013 from the name of the calculator

Fixes since version 7.6:

• Fixed inaccuracies with “Number of Exchange Data Volumes per Server” input
• Fixed calcActDBPDCWorst formula to take into account non-HA deployments
• Fixed multiple dbs / volume calculation to take into account ReplayLagManager
• Fixed calcNumDBCopyInSDC formula to take into account proper number of lagged copies
• Fixed MaxPreferredActive not being displayed for A/A (Single DAG) site resilient solutions
• Fixed an issue with Fail* buttons on Distribution tab when using some regional settings
• Fixed an issue with volume path persistence on the Distribution tab Mount Points dialog

You can download the calculator here. For more information, please consult the list of changes here or Read Me here.