3370475 - [E-Mails] Own SMTP connection brings SMTP error message "Server connection timeout: failed to establish connection with server within 15 s."

• When using own SMTP for sending, the following error message is displayed: "SMTP Server connection timeout: failed to establish connection with server within 15 s.".
• The service uses Microsoft and oauth2.

• SAP Field Service Management

oauth2, email, smtp, configuration, SMTP Server connection timeout: failed to establish connection with server within 15 s , KBA , CEC-SRV-FSM , Field Service Management , CEC-SRV-FSM-ADM , FSM System Administration , Problem