o.k.
The warning is regarding two of my four hosts. When removing the two hosts, i have connected via VPN, the warning is gone.
When adding them again to the vCenter, the warning came again.
In the vpxd.log i found some errors:
error vpxd[08748] [Originator@6876 sub=CryptoManager opId=caf96fb2-8c63-4d2d-9090-154e9a73616b-e9] Failed to call com.vmware.esx.authentication.token.create on host [vim.HostSystem:host-23921329,vmsrv06.xxxx.local]
[...]
--> "N7Vmacore15SystemExceptionE(Connection refused: The remote service is not running, OR is overloaded, OR a firewall is rejecting connections.)\n[context]
[...]
--> "id": "vapi.send.failed"
[...]
error vpxd[08748] [Originator@6876 sub=CryptoManager opId=caf96fb2-8c63-4d2d-9090-154e9a73616b-e9] Failed to get key providers vSphere Native Key Provider status on [vim.HostSystem:host-23921329,vmsrv06.xxxx.local]:
--> vapi.send.failed.
error vpxd[08748] [Originator@6876 sub=CryptoManager opId=caf96fb2-8c63-4d2d-9090-154e9a73616b-e9] Failed to query key providers vSphere Native Key Provider status on host-23921329: internal error.
The error is for both hosts the same, they are Dell R720 servers with vSphere 7.0.3, o.k. not supported, but i don't think that this is related to the host hardware. And i created the Key Provider for using "without" a TPM in the host hardware...
And more confusing is, that when i create one for using with TPM host hardware, that the state is active and it shows no problems.
The complete network is open through the VPN and i never had issues in the past. This is the first service which makes problems.
Anny ideas what can cause such problems?
I think i deploy a vCenter on one of the problematic hosts to see if the problem is local too, and then i can add one of my working hosts via VPN from the other side to test...
Or i ignore that error, for my two local SuperMicro hosts i have orderes two TPM 2.0 modules, so i can configure it with host hardware and then it didn't show a error...