Hey, Clarke15. There was a known issues affecting TPG emails and our Network Engineers are working now to fix it, could you please refresh the outlook and let us know if the issue still persists.      I keep getting an error message in Outlook which says - the server you are connected to is using a security certificate that cannot be verified. A required certificate is not within its validity period when verifying against the current system clock or timestamp. How do I solve this issue. ... View more