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After reviewing a lot of info about Basic Auth, and when Microsoft will disable basic auth, is there any paid solution (secure and reliable) to connect multifunction devices with Exchange online with a shared account impersonating users? Now that IIS 6.0 and SMTP role is no longer receiving updates. Having in mind that there are a few of scanners and printers that do not support OAuth2 or MFA. I appreciate any advice.
You can still have SMTP configured in IIS of 2019 server and then have a connector in exchange onlinen to accept those emails from the onpremise relay. You can also check the Option 2 from the Microsoft Article https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365
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Please refer to the link Ajinkya Ghare shared.
If you do not want to use basic auth, you can either user Option 2 (direct send) or Option 3 (SMTP relay).
Both options do not require an existing licensed mailbox.
For more details about the differences: Compare the options
Thanks for your answer but in a security scope it is not secure? We can have other solution that is not Microsoft?
Since Exchange Online uses opportunistic TLS, if the devices support TLS 1.2, the connection would be encrypted by TLS, which makes it secure.
We can have other solution that is not Microsoft?
Sorry but I'm not quite sure what your goal is.
Could you please provide more information?
For example, you need to use a mailbox hosted in Exchange Online to send messages,
or you simply need a SMTP relay service.
While please kindly note that, if you are looking for third-party solutions, due to policy we cannot make recommendations for you.
I am writing here to confirm with you how thing going now?
Please let us know if you would like further assistance.