I've been getting these off and on and am not sure if this is a problem in Marketo or in MS Dynamics. Most often I get "Unable to update lead," with the occasional "Error: Invalid Credentials."
Does anyone know if I should submit a case to Marketo Support, or if I should instead contact our MS Dynamics administrator? I'm one of the admins for our Marketo instance so I should know the answer, but don't.
I would definitely log a Marketo Support ticket. Yet at the same time, loop in your CRM team to have a look. It sounds like a security role issue where the Marketo Sync User is unable to update existing records.
I might, although I don't personally use MSD.
For this question, I wasn't (and am still not) sure the problem is happening because there's something not right in MSD or something not right in Marketo.