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

Steve, that should be Apple Mail and this should apply:

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:

1. Go to Settings> Mail> Accounts.
2. Tap the email account you want to remove from your iPhone, then tap Delete Account. For more information, please go to Add and remove email accounts on iPhone.

Add your account back to Apple Mail:

1. Go to Settings > Mail.
2. Tap Accounts, then tap Add Account.
3. In the Add Account dialog, choose Outlook.com.
   

If removing and re-adding the account does not address the issue, do the following: 

1. Remove the account again.
2. Go to Settings> Safari, then tap Clear History and Website Data.
3. Reboot your iPhone.
4. Add the account back and proceed through the Outlook.com account sign in flow.

The full support article is here:

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

Thank you for a clear and easy reply. Hopefully even I can follow those instructions

I called Microsoft for help and they put me onto a chat with someone who said it was a phishing email and I had to change my log in details and create an alias name as a primary email. I was told not to respond to this email, which now I find out is genuine. I was on the phone for 45min all to no avail at the end. I am just hoping after the 16th I can still receive emails. By the way I am 73 and have children who are of no help to me at all in this matter. I even asked a computer geek to help and he didn't know what to do either!

Hi Stan433,

First let me declare that I am not an expert, but do understand your need for clarity in simple terms. I just tried the following and then it seems to have worked for me. I have a desktop version of Outlook 2016 and was using the doomed POP/SMTP method of syncing. In following directions from Microsoft (as I understood them) I did the following(please read as you go so you don't download a years worth of emails you already have):

In Outlook select File/Account Settings/Email address you are using/New/Advanced/Set Up Manually/Outlook.com.

This created a new folder with the same email using, what I believe, the newer Exchange/Modern Authentication method. After that, just because I prefer, I moved all of the contents from my POP/SMTP folders(Inbox, Sent, Deleted) to my new folders of the same email. I will wait a few days to see if my emails are correctly downloading into the new email folder(same address) that I just created and then I will delete the older folder(same address) using the POP/SMTP.

Lastly, let me again remind you that I am not an expert and, although, this seemed to be the right answer, I am not trying to lead you astray. If anyone wants to offer a different solution, I would love to hear that.

Hope this helps,

Lori

Because I also received this 'warning/announcement' email in my Outlook mail accessed on their website, I'm guessing it's an auto generated email sent to all users - even though my email contained a line saying 'you are receiving this email because you access your account using a third party...'