Look at https://helpx.adobe.com/security/alertus.html
You will find an address to report phishing. If it’s legit, they’ll probably say so.
In any case, examine the From: address for unlikely format, etc. That’s usually the easiest way to spot suspected phishing.
Adobe requests login when you access their various programs, never via email. I've been using their products for more than a decade. I've never had an email requesting me to login, either with my rental CC products, or CS2, CS5 or CS6.
I agree with Hendrik, contact Adobe directly via support on their web site.
With any email, look at the email address of the sender and see if it is actually from who they say it is. Hover the mouse pointer over the link and see if the URL domain is what it should be. If it is weird email address and URL, just report it as phishing. And no doubt it will be a weird address and URL with any email like this that ask for login and other confidential info.