A handful of customer service agents in my org are getting this error for only a handful of cases when trying to send emails to customers through the case records. I have tried validating their email addresses but it has not worked. They have read, create, and edit permissions on the case object. I researched this issue and came across the fact that if you do not have access to a certain related record, then you may get this error. Why would this error only pop up on certain cases if they do not have the correct record access? And how do I go about fixing it?@* Service Cloud * #Service Cloud
I've seen this error happen when the person who owns the account or contact associated with the case is no longer an active user. It may have nothing to do with the person who owns the case directly.