Hi S •,
Greetings!!
The Business-Critical tier for Azure Database for MySQL Flexible Server uses E-series compute (such as Edsv4, Edsv5, and Eadsv5). In the Reservation API, the SKU name appears as AzureDB_MySQL_Flexible_Server_Business_Critical_Compute without a series identifier. This is by design the Business Critical reservation SKU is generic and applies across all supported E-series families for this tier. When you purchase this reservation, Azure automatically matches it to the appropriate Business Critical compute series behind the scenes.
For more information, please refer the document:
https://learn.microsoft.com/en-us/azure/mysql/flexible-server/concepts-service-tiers-storage
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