If the tenant level configuration is set to disable Basic authentication, Outlook will not connect.
If the value is blank, the tenant level configuration will be honored at the mailbox level. To check the current authentication setting at the mailbox level, run the following command: Get-EXOCasMailbox -Properties SmtpClientAuthenticationDisabled | Select SmtpClientAuthenticationDisabled To enable Basic authentication, run the following command to revert the value to "False": Set-TransportConfig -SmtpClientAuthenticationDisabled $Falseįor more information about the Set-TransportConfig command, see Set-TransportConfig. If the value is "True," Basic authentication for SMTP is disabled, and only SMTP OAuth-capable clients will be able to connect. If the value is "False," Basic authentication for SMTP isn't disabled. To check the current authentication setting at the tenant level, run the following command: Get-TransportConfig | Select SmtpClientAuthenticationDisabled Then, you can either wait for the token to be refreshed after it expires, or run the following command to force it to refresh immediately: Set-User -Identity -STSRefreshTokensValidFrom $(::UtcNow)Įnable Basic authentication for the SMTP protocolīasic authentication for the SMTP protocol can be enabled and disabled at the tenant level or at the mailbox level. To re-enable Basic authentication for these protocols, run the following PowerShell command: Set-AuthenticationPolicy -Identity -AllowBasicAuthPop -AllowBasicAuthImap If you previously disabled Basic authentication for POP or IMAP by using an Exchange Online authentication policy, you can change the policy to allow these protocols. Enable Basic authentication for POP and IMAP protocols To do this, disable Azure Active Directory security defaults if they are enabled. If you're using POP/IMAP and SMTP for an Exchange Online account in Outlook, you must enable Basic authentication for these protocols. This is because Outlook supports Modern authentication for only Exchange,, and Gmail at this time. If you have disabled Basic authentication, and you are trying to configure an Outlook profile by using POP and SMTP or IMAP and SMTP, you will notice that Outlook neither connects nor authenticates. Also, tenants are encouraged to disable Basic authentication, and move to a Modern authentication tenant for modern clients. See the discussion on removing Sun Java System Synchronization Program in Connector for Microsoft Outlook Administration Guide.Microsoft recently announced the Exchange Online capability to use OAuth authentication for POP and IMAP and SMTP protocols. 
If the synchronization program has been installed on a particular user's desktop, it must be removed.
#Zoho outlook connector software#
The software cannot be installed to any workstation that contains the Sun Java System Synchronization program, which is incompatible with Connector for Microsoft Outlook. If Outlook is not set as a user's default email client, see the discussion on designating Microsoft Outlook at the default client in Connector for Microsoft Outlook Administration Guide to resolve this problem. Microsoft Outlook must be designated as the user's default email client. The following operating systems are deprecated:
The following operating systems are supported: This section describes the supported operating system requirements and recommendations for Connector for Microsoft Outlook.
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