# Limitations
<a name="s3-limitations"></a>

When using Amazon S3 integrations in Amazon Quick, be aware of the following limitations:
+ The Amazon S3 bucket must be in the same AWS Region as your Amazon Quick application.
+ Each document can have a maximum of 2,500 individual user or group ACL entries.
+ Global ACL configuration file maximum size: 100 MB.
+ Document metadata file maximum size: 5 MB.

For more information about document-level ACL limitations, see [Limitations](acl-best-practices-kb.md#acl-limitations).