Check/Edit Attachment Size in Carbonio CE

Hi
Can anyone please suggest me how I can check what is the attachment size limit for emails and how I can change that?

I found somewhere in the forum that I need to run some command in order to get the result, here is my result, if that helps -

root@mailx:/opt/zextras/conf/nginx/includes# grep client_max_body_size *
nginx.conf.web.admin:    client_max_body_size    0;
nginx.conf.web.admin.default:    client_max_body_size    0;
nginx.conf.web.carbonio.admin:    client_max_body_size    0;
nginx.conf.web.carbonio.admin.default:    client_max_body_size    0;
nginx.conf.web.https:    client_max_body_size    0;
nginx.conf.web.https.default:    client_max_body_size    0;

In Zimbra, we could set the limit from COS, do we have something like that in Carbonio?