Reset Password button missing for Community Users

If you are created a community user and you don't see 'Reset Password' button on user detail record then one of the reason of missing button is that you might not have added that user to community as member.

Steps to add the Community User:

1. Go to Setup.
2. Search 'All Communities' in Quick Find.
3. Click on workspaces link next to community.

4. Click on Administration.

5. Select Members from left panel
6. Select the user's profile and click on Add.