kibana/docs/reference/configuration-reference/cases-settings.md

navigation_title	mapped_pages	applies_to
Cases settings	https://www.elastic.co/guide/en/kibana/current/cases-settings.html	deployment self all

Cases settings in {{kib}} [cases-settings]

You do not need to configure any additional settings to use cases in {{kib}}. To provide greater control over case features, you can configure the following settings in the kibana.yml file:

xpack.cases.files.allowedMimeTypes

The MIME types that you can attach to a case, represented in an array of strings. For example: ['image/tiff','text/csv','application/zip']. The default MIME types are specified in mime_types.ts.

xpack.cases.files.maxSize

The size limit for files that you can attach to a case, represented as the number of bytes. By default, the limit is 10 MiB for images and 100 MiB for all other MIME types. If you specify a value for this setting, it affects all file types.