SLA defines Microsoft’s commitment for uptime and connectivity and what the customer is entitled to if Microsoft does not meet the commitment.
SLA is specific to each resource in Azure.
SLA also defines under what conditions Microsoft will make the guarantee.
Identify each resource you use, which resources have dependencies on other resources and figure out the expected time up percentage.
Question to ask yourself: Do you need to do better? Will the value of downtime affect your business? How much revenue could i lose?