An Azure relational database service.
Hello Mickael !
Thank you for posting on MS Learn Q&A.
If you check the doc link below you will find that the free Azure SQL Database offer has monthly limits of 100k vCore seconds, 32 GB data storage,and 32 GB backup storage.
If you select auto-pause until next month the database becomes inaccessible until the next calendar month and if you select continue using database for additional charges / BillOverUsage the database should stay online and bill overage usage. https://learn.microsoft.com/en-us/azure/azure-sql/database/free-offer?view=azuresql
Try to verify the actual resource state from CLI, not only the portal:
az sql db show \
-g <resource-group> \
-s <server-name> \
-n <database-name> \
--query "{status:status,useFreeLimit:useFreeLimit,freeLimitExhaustionBehavior:freeLimitExhaustionBehavior,sku:sku}"
then force the setting again from cloud shell:
az sql db update \
-g <resource-group> \
-s <server-name> \
-n <database-name> \
--free-limit-exhaustion-behavior BillOverUsage
also check that the subscription can actually accept overage charges because if it has a spending limit, Azure can disable resources for the rest of the billing period once the spending limit is reached and in that case you need to remove the spending limit or upgrading the billing restriction may be required.