Hi, I recently updated a couple of PC to office 365 2019 following msguides installation. Before the upgrade, all pcs had a moderate use of outlook, they were able to send and receive emails in real-time.
After the upgrade, pc can only receive emails and is not able to send outgoing emails. This occurs on both Outlook and Mail platforms.
SMTP settings are correct on both (Microsoft test emails are received).
What could be the issue?