Working with an Office365 Email Account

 

Microsoft Office365 mail servers now require TLS version 1.2 or above which may require additional settings. If you experience authentication issues, there are a few things you should check:

 

1. Verify that authenticated SMTP submission (also known as SMTP AUTH) is enabled on the licensed mailbox that the ICONICS application is using to connect to Microsoft 365 or Office 365. You can use Exchange Online PowerShell:

Get-CASMailbox -Identity <EmailAddress> | Format-List

SmtpClientAuthenticationDisabled

Set-CASMailbox -Identity <EmailAddress> -SmtpClientAuthenticationDisabled $false

 

2. Disable Multi-Factor Authentication (MFA) on the licensed mailbox that's being used:

3. Disable the Azure Security Defaults by toggling the Enable Security Defaults to No:

Note: Disabling the security defaults represents a security risk so use it with caution.

4. Exclude the email account from the Conditional Access policy that blocks Legacy Authentication:

 

Applications that rely on TLS 1.2 strong encryption may also experience connectivity failures after a Windows upgrade. This could be caused by an old version of .NETFramework (you need at least 4.8. or above). Either upgrade .NETFramework to the latest version, or find possible workarounds here.

If these steps do not help, you will need some changes in the registry settings. In that case please contact our technical support for more details.