We would like to be able to configure Bitbucket Server to enable new repositories to have Git LFS enabled by default.

It defaults to ‘disabled’ as detailed here: https://confluence.atlassian.com/bitbucketserver/git-large-file-storage-794364846.html

As per support discussion here: 

https://community.atlassian.com/t5/Bitbucket-questions/Can-we-enable-LFS-by-default-for-new-repositories/qaq-p/801852?utm_campaign=&utm_content=post&utm_medium=email&utm_source=atlcomm