Q: Template is not available to users for generation

Template is not available to a user if:

1. Template is disabled. Enable template on Templates list page via context menu that is location on the right side of template record.
2. Template's Context is not set correctly. Each template has a context associated with, and will be available only in selected context. Context can be selected on template edit page. Currently, available context options are: 'Issue' and 'Issue List'. Template having context 'Issue' will not be available on issues search page, for example.
3. Template permissions are not set, or set in a way that doesn't permit a user to use a template. Please see Template Permissions.

Q: Template is not visible to other users in Jira's top menu 'Templates'

Templates page will only show templates that are created by you, or those having "Can Edit" flag set in template permissions dialog.