Mass update domain in threads created from showcase after domain change

Are you asking about POST content in a THREAD? If so, POST CONTENT is HTML, not XenSyntax, so a LINK in a POST won't dynamically change. You'd have the same issue with XenForo Resource Manager links in Post #1 of an associated discussion thread as those are HTML links in the post content.

You CAN use Kiers Post Content addon to do search and replace on POST content. It allows you to do search and replace on ALL posts on your site. You can search for your old domain name and replace it with your new domain name in ALL posts (not just showcase links, but ANY link in any posts that is using the old domain name.

 

This is the addon: Post Content Find / Replace

And here is someone that did exactly what you want to do: Post Content Find / Replace

ALWAYS backup your Database prior to doing this stuff in case you need to perform a rollback.

 

Its pretty slick how easy it works