openssl office365 certificate download

 # Get smtp.office365.com certificate output

echo | openssl s_client -showcerts -servername smtp.office365.com -connect smtp.office365.com:995 2>/dev/null | openssl x509 -inform pem -noout -text

openssl s_client -showcerts -connect smtp.office365.com:587 -starttls smtp 2</dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p'

# Export smtp.office365.com certificate to .pem

openssl s_client -servername smtp.office365.com -connect smtp.office365.com:995 </dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /sslDir/smtp.office365.com.pem