Certificate error when opening outlook "res.cdn.office.net"

ArjanKS

How do I get rid of this message (or how to fix it)? Have 5pc's all with 365, but one PC gets this error every single day. Already removed bitdefender and reinstalled it, installed the certificate several times, but also this doesn't do much.

Any suggestions?

Alexandru_BD

Hello @ArjanKS and welcome to the Community!

This situation can only be resolved by contacting the Support engineers using this link. There's a related discussion on our forum regarding this certificate error and you can find out more information by accessing the thread below:

https://community.bitdefender.com/en/discussion/95418/api-diagnostics-office-com-security-certificate-issue-any-help

Regards