My recommended edit:
Questioners must have required access to fix the problem. Questions must be posted by someone with the appropriate access to obtain diagnostic and debug information and to apply suggested fixes. Some questions are more appropriately addressed to an OEM/VAR or to the party that manages or warrants the hardware/software in question. We recommend reaching out to these parties to receive further assistance on the issue.
Just a suggestion. Figured it's better to start off under the same flow as your first bolded sentence and then talk about OEM/vendor stuff.