Many services where two-factor authentication is enabled require app specific 
passwords. I have enabled two-factor authentication for my Microsoft 
Outlook.com account as well as for my Office 365 Business account and I had to 
create app specific passwords fo from both services to set up my Outlook and 
Mail apps on the PC and iPhone.

From: [email protected] <[email protected]> On Behalf Of Maria 
Reyes
Sent: Sunday, May 13, 2018 8:59 AM
To: [email protected]
Subject: Re: app-specific passwords question

Hi, app specific passwords are only for iCloud email addresses. You will get a 
code sent to your other trusted devices when you try to log in with another 
device or browser. At least with my outlook apple ID I don't need to create app 
specific passwords.
Sent from my sprint iPhone X!!!

On May 13, 2018, at 11:32 AM, Sieghard Weitzel 
<[email protected]<mailto:[email protected]>> wrote:
I don’t think you can use an app specific password on two different devices.
Maybe try it, but I think the point is that you create one for each device in 
order to maintain the security of your two-factor authentication.
The point of app specific passwords is that you use them once on a specific 
device for whichever app they were created for, if you ever don’t use said 
device any more you can log into your Apple, Microsoft or gmail account and 
revoke/delete the app specific password for said device to make extra sure it 
can’t be used again.
I did read one article just now which said the security of app specific 
passwords is a bit of a pretence since according to said article anybody who 
could gain access to your app specific password can use it to access your 
account, apparently even to log into your account online. But this article was 
4 years old and if you need app specific passwords that means you have 
two-factor authentication enabled and hence logging into to your account online 
should require you to also enter a code given to you by text message or via an 
authenticator app such as Microsoft Authenticator or Google Authenticator.
I certainly never use an app specific password again and if I buy a new 
computer or a new iPhone I always generate another one to use with that 
particular device.

Regards,
Sieghard

From: [email protected]<mailto:[email protected]> 
<[email protected]<mailto:[email protected]>> On Behalf Of Daniel 
McGee
Sent: Sunday, May 13, 2018 12:26 AM
To: [email protected]<mailto:[email protected]>
Subject: app-specific passwords question


Hi all. So I plan to install outlook, gmail and inbox across my two devices and 
after trying out each app, evaluate which one I will go with.

However, I have a question about re using an
app-specific 
password<https://www.imore.com/how-generate-app-specific-passwords-iphone-ipad-mac?amp>.Having
 one password on my two devices, would it be bad practice if I created one 
app-specific password for say, the gmail app and use it again on the second 
device?

Or should I create each
app-specific 
password<https://www.imore.com/how-generate-app-specific-passwords-iphone-ipad-mac?amp>
 per each device I'm using?

I wanted to go with the best security practice and wondered which idea you 
would recommend from a security point of view.

Daniel
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