Can I use my extended license in magazines?
Yes, you may use extended licenses in a magazine, provided you follow all the terms and restrictions of Adobe Stock as mentioned here: Stock Licensing & terms FAQ: Where can I find the terms and licensing information for Adobe Stock?
Feel free to update this thread in case of any additional questions.
Thank you. Still a little confused. Do I need to credit the author?
We require a photo credit to be added only when using the image in an editorial article or for social media. For more information, please refer to Common Questions, Adobe Stock
I would suggest you to include a credit line to the photographer if using an unmodified image from Adobe Stock.
However, if the images(licensed from Adobe Stock under the extended license) are modified a credit line becomes optional.