SBS2011 server has two problems.
At around 4pm the Exchange server stiopped workin properly.
Emails sent show as leaving server in Message Tracking but don't arrive - actually one did but only one and others sent to same user as one that arrived have not done so.
No emails received.
Sending from OWA works.
Second problem is that when logged in as netadmin I can't stop services, I get permission denied...
Any solutions, really urgent!