Dears
I am working on Exchange sizing for one datacenter to support 500 mailboxes each with 3GB size.The customer needs 3 DAGs implementation in 1 datacenter only. Can you please confirm that 8 servers are needed? The calculator confused me as I thought we will need 6 servers in the primary site considering 3 DAGs. Can you help how to use the calculator in this case and are the below right?
| Mailbox Database Copy Configuration | Value |
| Total Number of HA Database Copy Instances (Includes Active Copy) within DAG | 3 |
| Total Number of Lagged Database Copy Instances within DAG | 1 |
| Number of HA Database Copy Instances Deployed in Secondary Datacenter | 0 |
| Number of Lagged Database Copy Instances in Secondary Datacenter | 0 |
| Environment Configuration | / Datacenter 1 | / Datacenter 2 | / DAG | / Environment |
| Recommended Minimum Number of Dedicated E2013 Client Access Servers | -- | -- | -- | 0 |
| Number of DAGs | -- | -- | -- | 18 |
| Number of Active Mailboxes (Normal Run Time) | 250 | 250 | 28 | 500 |
| Number of Mailbox Servers / DAG | 8 | 0 | 8 | 144 |
| Number of Lagged Copy Servers / DAG | 0 | 0 | 0 | 0 |
| Total Number of Servers / DAG | 8 | 0 | 8 | 144 |
Thanks..