Indeed, url and domain are saved even if system user/system password wrong ("...The settings have been saved.")
Up to the moment, system user/password have been used by DWP to obtain data from DWP-C in tasks, that are out of a user context (periodic background tasks).
Most typical example - notifications about DWP-C request status change.
Having said that, we would like to reserve the right to use system user/password for more than just background tasks. That's probably why validation error was phrased in generic terms.
So to clarify, what you're saying is that the system user credentials on this page are not only for manual verification, but also to sync the request status between DWP and DWP-C? ie, if the system credentials are incorrect, but saved (similar to my post above):
1. The system will still save the incorrect credentials
2. I could still view / request items from DWP-C through DWP, as the integration is in-place via the url and domain
3. Status updates and changes will not be reflected, as this relies on the correct system credentials
I understand going forward there may be other use-cases for the system credentials, but is the above how it is expected / designed to work today (in versions up to and including 19.11)?
(3) is put as below:
Status updates and changes will not be emailed / pushed on mobile device, as this relies on the correct system credentials.
I have the same issue!, did you resolve your issue? if yes, could you please share the resolution?
We were on Helix so we had to reach out to BMC to apply the right credentials.