How I can transfer my stock account to my husband (photographer) ?
Is this an account used to buy (license) stock images?
Or an account used to offer photos for use in the Adobe Stock catalog?
used to offer photos for use in the Adobe Stock catalog
This seems impossible. When you contribute stock images, you are guaranteeing that YOU PERSONALLY made the photos and own all the rights. You cannot transfer these to another person, because they DID NOT make the photos. From Account and submission guidelines at Adobe Stock "Understand copyright. You must own or control all the rights to the files you submit to Adobe Stock. Don’t submit files that don’t belong to you, such as photos taken by your spouse."
So, if you want to stop adding photographs, you can do this, but you cannot transfer your portfolio of pictures. You have to continue to handle the earnings yourself.
Transfer of Copyright for your images can be done legally to another party ( in the U.S. though I can't speak to the process in other countries); however I don't know whether Adobe Stock provides any mechanism for doing it within their apps.
Transfer of copyright can be done quite everywhere. In some countries, however, you will not be able to transfer the moral rights.
But the primary question is: can you transfer ownership from an account to a third party? If you are a business, part of your business value is the account with its reputation and may be regular sales. So you should be able to sell that to a successor.
And there need to be a method (even if it is manual) to transfer ownership of an account to a third party, for example in case of the death of the account holder.
You may wish to consult a family lawyer.