Issues with Office365 setup and Plesk

Hi,

I hope you are all well and thanks in advance for any help and support.

We have a client who is using an external company to setup office365 to manage their emails. The website is hosted on our Plesk box.

Office365 is failing as it is somehow looking at the default self signed SSL certificate for the plesk panel and not getting any further

Any ideas how to resolve this? The IT company are baffled, my hosting company are baffled and everyone is blaming everyone else.

If you use...

Issues with Office365 setup and Plesk