Sending mail stopped working - Office 365
In trying to research another issue (why is email from helpdesk not being set outside our O365 domain) I accidentally broke our outgoing mail settings, and I cannot put them back. I took a screenshot of the initial settings, which have been working for months. I tried changing various parameters and nothing worked to get mail delivered to an outside address, so I gave up. Now that I've reset everything back as it was, it's not working. When I try to reply to a ticket it waits about 15 seconds and then creates a popup saying "Sending notification failed." The O365 Connector is good, didn't change anything there.
Can anyone suggest why this is not working like it used to? Do I need to restart the server or something? Is there a log somewhere I can see what exactly it's failing on?