@vcolmenares Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
As I understand you need to administrate the quota in directories level, not fileshare level ? If so, there is a windows OS level feature for that -> Under the file server role there is quota feature. This article will provide more information on Quota management : https://learn.microsoft.com/en-us/windows-server/storage/fsrm/quota-management
Note: This is for windows feature, not related to Azure, I have see some customer trying on Azure File share.
You need more information on this Quota management I would recommend you to contact support, so If you have a support plan, I request you file a support ticket, else please do let us know, we will try and help you with different option.
Looking forward for your reply!
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