How do you manage Meta Data when using stock images?

I know about those sharks, and it is unfortunate that Adobe's licensing terms are open to interpretation.

(A) Standard License for Works. Under a Standard License, we grant you a non-exclusive, perpetual, worldwide, non-transferable (except pursuant to section 6 (Additional Rights)), non-sublicensable license to use, reproduce, archive, modify, and display the Work, in all media, for (1) advertising, marketing, promotional and decoration purposes; and (2) personal and non-commercial uses, up to 500,000 times as further described in section 3.1(B) (“Standard License Specific Restrictions”).

vs

(H) remove, obscure or alter any proprietary notices associated with the Stock Assets, or give any express or implied misrepresentation that you or another third party are the creator or holder of Intellectual Property Rights in any Stock Assets;

The Adobe Stock licensing terms demand, you don't remove e.g. copyright information embedded in the images meta data. Generally that's not a problem when you're using the images just as they are, but that's rarely the case. 

By @rottroll123

If you read it as intended, you should not remove the metadata from the original file. It is virtually impossible to keep all the metadata as soon as you create an edited version of the original asset. The best example of this is you combine two or more assets into a new work. What metadata do you keep? As a side note, H is intended to disallow you to remove the watermark from the preview images and not to protect the (mostly) useless metadata.

Technically, when you modify a work, you create a new work based on an existing one. But the original work is not modified or altered in any manner, and no metadata is stripped. It's just not added to the new creation, which may well be a cropped and resized derived work of the original asset. 

You would need to use complex scripting to track down the assets and to copy metadata from the original asset to the modified one.