Email from Microsoft titled "Action Needed – You may lose access to some of your third-party mail and calendar apps" Is this a scam?

Mailbox access using a browser is not affected.

iOS mail app may or may not be affected depending on how it is configured.

This article walks you thru fixing iOS mail problem IF you experience it:

https://support.microsoft.com/en-us/office/modern-authentication-methods-now-needed-to-continue-syncing-outlook-email-in-non-microsoft-email-apps-c5d65390-9676-4763-b41f-d7986499a90d#:~:text=Modern%20Authentication%20Methods%20now%20needed%20to%20continue%20syncing,5%20If%20you%20use%20Mozilla%20Thunderbird%3A%20More%20items

If you use Apple Mail:

Apple Mail supports Modern Authentication by default when you setup the account as Outlook.com. If you use Apple Mail and you are seeing password prompts or connection errors, this is most likely happening because your account got configured as basic authentication. To mitigate the issue, remove the account and add it back as Outlook.com:

Thank you!

I appreciate it.

what about those of us who are using older microsoft products such as Microsoft Office Outlook 2007? are we going to be forced into buying a new version of the software so that microsoft can stick it to us for more money? will there be a plugin, update, or some other solution available, or is microsoft going to just piss us off yet again?

From the Support Article:

Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps

If you use Outlook for Windows: 

Outlook supports Modern Authentication in all current Microsoft 365 subscription SKUs and Outlook 2021 LTSC (any SKU with build 11601.10000 or higher) when connecting directly as Outlook.com. If your Outlook is configured to connect to Outlook.com using POP or IMAP, Modern Authentication is not supported. This means that when Basic Authentication is fully deprecated, it will no longer connect.  For this scenario, you have a few options:

Option 1: Get a newer Outlook email app which supports Modern Authentication

If your Outlook client does not support Modern Authentication, you will need to upgrade to the latest version and then setup using Outlook.com Sync. You can either purchase a new Outlook License, use the Outlook that is included in your Microsoft 365 subscription, or download Outlook for Windows for free.  

Option 2: Switch to Outlook.com/Exchange Syncing

Instead of using POP/IMAP and SMTP, create a new Outlook Desktop profile and then add your Outlook.com account using automatic account configuration, which will add the account with Modern Authentication. To do this, please use the following guidance:

1. Create a new Outlook Desktop profile. For more information, please go to Create an Outlook profile.
2. Add your Outlook.com account. For more information, please go to Add an email account to Outlook.

The following versions of Outlook Desktop do not support Modern Authentication for Outlook.com:  Outlook 2007, Outlook 2010, Outlook 2013, Outlook 2016 MSI, Outlook 2019 LTSC. Any release of Outlook Desktop with a version less than 11601.10000 does not support Modern Authentication for Outlook.com.

I am 81 years old and I do not know **** you are talking about. Do I have to hire someone to do look into this. What ever happened to “ease of use”. You don’t seem to care about us the non nerdy. Richard