/var/log/syslog
you see a private key entered.VMware NSX
VMware NSX-T Data Center 3.x
Due to an incorrect debug setting, the private key was logged in the NSX managers syslog file.
If a logging server is enabled, the key may be present there also.
This issue is resolved in VMware NSX 3.2.3.2
This issue is resolved in VMware NSX 4.2.0