Issue with Mesh parts, not fully rigged

Support Modeling
1

Parts of a character mesh are not properly rigged to the skeleton (see below image). How can I add the non rigged meshes to the rest?

Thanks

GlovesMeshIssue
GlovesMeshIssue1920×1080 202 KB

2

This tutorial solved it for me

How do I fix vertices that aren’t following the armature?