any document for Microsoft 365 with AWS.

​@Kumargin  Can you be a little more specific? You are talking about protecting O365 to an AWS storage target?
AWS https://documentation.commvault.com/v11/essential/supported_cloud_storage_products.html
O365 https://documentation.commvault.com/2024e/essential/office_365.html

Yes

Thanks for confirming.

So there should be no issue in this setup.
Cloud storage / AWS is supported as per
https://documentation.commvault.com/v11/essential/supported_cloud_storage_products.html#vendor-support

O365 backups leverage a proxy which will back up the data to the MA/Storage it behaves as any other backup. You can use your media agents that have access to the as storage as O365 proxies assuming they meet the requirements
https://documentation.commvault.com/v11/essential/system_requirements_for_exchange_online.html