I want to migrate users from a old Server to a new one. I use the following commands from ZCS-to-ZCS.

Old Server
zmmailbox -z -m joe@example.com getRestURL "//?fmt=tgz" > /tmp/joe.tgz
The export is ok. Then import to the new server
zmmailbox -z -m joe@example.de postRestURL "//?fmt=tgz&resolve=reset" /tmp/joe.tgz
didn't success. The following error appears
ERROR: service.FAILURE (system failure: POST failed, status=413 Request Entity Too Large)
I couldn't find anything in the logs.