Were those users created in 11.01 or have they disappeared after an upgrade? Have they been created recently? Are you really sure the "Finish" button has been clicked to update the user database? What do you see with "omniusers -list"?

OK, that's a different story. Let's check this step by step. The first step has been:

omnicc -secure_comm -regenerate_cert xxxxxx

So I understand this was run on the cell server and xxxxxx was the name of another server. Is this indeed what was done? Please confirm.

OK, that's a different story. Let's check this step by step. The first step has been:

omnicc -secure_comm -regenerate_cert xxxxxx

So I understand this was run on the cell server and xxxxxx was the name of another server. Is this indeed what was done? Please confirm.

yes correct-

In that case I would rerun it with the name of the cell server:

omnicc -secure_comm -regenerate_cert <CS_FQDN>

This will generate the correct localhost certificate on the cell server again. Next you will need to run:

omnicc -secure_comm -reconfigure_peer <CS_FQDN>

on all clients. Please let us know the status after that.

I never tested such a configuration and it is against the DP documentation and an unsupported setup. That's all I can say. If you want to keep on running like this then feel free. But I'm assuming you may run into more issues.

Back to your user issue, you may want to run the omniusers command in debug mode and provide the debugs to support.

I was curious enough to test your strange secure_comm situation and it looks like basic functionality is still working, including the users setup. What else may have happened? What other commands may have been run to ruin the user setup?

If you have a chance to elevate a support case I would recommend that. This may need a deeper investigation.