When using Microsoft365, Exchange Online, etc. to send
                  e-mails from this machine, it is recommended to use the OAuth 2.0
                  authentication method.
This section describes how to operate OAuth 2.0 authentication.
With OAuth 2.0 authentication,
                        the service provider provides an access token that can be obtained
                        by the machine to send and receive e-mail. 
This section describes how to obtain the token.
The settings should be configured by the administrator of
                        the machine.
The following settings are available for SMTP authentication,
                        and the setting method is the same for all cases.
Tap "Settings (Administrator)" → "System Settings"→ "Network Settings"→ "Service Settings" → "SMTP" tab.
Configure necessary settings such as "Primary Server", "Port Number", "Timeout", "Sender Name", "Sender Address", and "Enable SSL/TLS" in the SMTP Settings.
Select "OAuth 2.0" as the Authentication Method.
Select a provider.
Enter an account name.
Tap the [Get Token] key.
Tap the [Get Token] key, then tap the [OK] key when a confirmation message appears.The following settings are common. When OAuth 2.0 authentication
                        is received for any one of these settings, the settings are updated
                        in concert with each other.
The following settings are available for POP authentication,
                        and the setting method is the same for all cases.
Tap "Settings (Administrator)" → "System Settings"→ "Image Send Settings"→ "Internet Fax Settings" → "Server Settings".
Configure necessary settings such as "POP3 Server", "Port Number", "Check Interval", and "Enable SSL/TLS" in the settings.
Select "OAuth 2.0" as the Authentication Method.
Perform steps 4 to 6 in SMTP Authentication Settings.
All POP authentication settings are independent. Even
                        if you have OAuth2.0 authentication in other POP authentication settings,
                        OAuth 2.0 authentication must be obtained separately.
Delete the tokens that have been set up
                        when using the machine with a new account in Exchange Online, etc.,
                        or when the tokens have expired and can no longer be used. The settings
                        should be configured by the administrator. Token deletion can also
                        be configured from the web page.
Tap the [Delete] key on each SMTP or POP authentication setting
                        screen to display a confirmation message. Tap the [OK] key to delete
                        the token.
When the token is deleted, the "Token" display will change
                        to [Not Retrieved].
The token status can be checked under "Token"
                        in any setting.
| Display with "Token" | Description | 
|---|---|
| 
                               Not Retrieved  | 
                           
                               A state in which the token has not been obtained.  | 
                        
| 
                               Waiting for authorisation  | 
                           
                               Permission to obtain a token has been obtained from the provider, but the machine has not completed obtaining the token.  | 
                        
| 
                               Retrieved  | 
                           
                               The token has been obtained and is activated.  | 
                        
| 
                               Invalid  | 
                           
                               The token has been obtained, however, the account is not available or the token is invalid because it has expired.  | 
                        
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