About this question
I have enabled email-to-case functionality and I have a user with Partner Community licence. He works on Partner Portal. When he opens an email through the Partner Portal its status is not updated to "Read" (It is still in "New" status). However if a Salesforce user opens the email, the status is automatically updated to "Read".
Has anyone spotted a similar issue? Are there any special permissions which need to be enabled for Partner Community users to invoke changing EmailMessage status.