Hi @Ameer Batcha Haja Mohideen ,
If you want small OS disks you should choose the [smalldisk] options for your Windows Server. These images are available for Windows 2016 and 2019.
I am recommending 2 DCs with the same configuration in an Availability Set.
Config for around 96 users could be look like this:
- VM SKU Standard_B2ms
- Windows Server smalldisk image (32 GB OS Disk)
- An additional 4 GB data disk for SysVol and NTDS.dit (host cache disabled)
For File Server and ERP Server without any details:
- VM SKU based on your requirements from the Ddsv4 or Dasv4 series
- Windows Server smalldisk image (32 GB OS Disk)
- Data Disk configuration based on your requirements. Keep in mind to disable host cache for disk containing transactionlog-files. Use different disk for data and transaction log files
Use Premium SSD as disk type (easy to calculate and good performance for the price)
How the customer will access the Azure environment? You have to add the costs for this as well in your calculation.
Azure Backup -> Costs depends on number of machines, amount of data and how long you want to keep the backups.
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Regards
Andreas Baumgarten