Forum Discussion
Certificate Error
Couple of my users are receiving this error for outlook.office365.com in Outlook 2010. Any ideas?
Up to you but would recommend to get users with older version of outlook to run this tool to get latest updates from 365. https://www.microsoft.com/en-us/download/details.aspx?id=50360
Been O365 Support Engineer, we had few customers having issues.
Our Office 2010 is already up-to-date.
We had a DNS server (small-office router actually) apparently corrupting DNS lookups – I suspect because the record Office 365 returns is rather large, what with multiple addresses and IPv6 addresses. Outlook was presumably thus sent to an adjacent server in the Microsoft server farm. Certificate errors was the error there. It would be interesting to see what server names were allowed by the certificate.
- HI cary！
Trouble to confirm whether all users have this problem。
If it is a few users, reconfigure Outlook is resolved!
