Im moving my old zimbra 5.X to new 8.0.
All works fine, but when i try zmmailbox -z -m user@domain postRestUtl '//?fmt=tgz' user.tgz
i get this error:
ERROR: service.FAILURE (system failure: POST failed, status=413 upload too large: file '/': upload too large)

After a lot of reading, i saw some ppl with same problem... some ppl say to do: zmprov modifyConfig zimbraFileUploadMaxSize 500000000000 ( i put this number in an arbitrary way, to test) But problem persists..
Small backups, like 200m 300M works so well!

I have backup files till 2.5GB...