Hello together,

I´m trying to get a SLES12 SP4 to SLES 15 but I always fail the time setup checks the registration server:

First message: Error connection to Registration Server failed Details: Invalid System credentials

Second Message: Check that System is known to the registraion Server. Upgrade from NCC to SCC might take a Long time ans if SLE11 System (no it is a SLES12 System) was installed recently you could speed up by login to SCC

SCC shows the System I also deregistered and registered it new. But nothing seems to help.

So how do I SCC to accept my system? What is the secret?