Problem with ms exchange certificate?

Question

Outlook

Good day,
how can I bypass this notification?

Answer 1

1. You can buy a certificate and install it. If possible, pay annually.
2. You can set up your CA and generate your own certificate.
3. You can try setting up Let's Encrypt (although I didn't do it in the mail. I don't know if it will work)
4. You can simply add the current certificate to the trusted ones on each computer.
I would choose the first or second option. The rest are so-so

Answer 2

As mentioned above, the third option can be safely used.
Try this instruction https://www.alitajran.com/install-free-lets-encryp...