Each user (with and without administrator permissions) can change the default global settings of Email Notifications Digest plug-in to be applied to his account only.
To configure personal settings click on user profile icon in JIRA and select Digest Email from menu:
→ The system will navigate you to Email Notifications Digest - Personal Configuration page:
It can happen that digest is enabled for a user but user forgot or did not select any of hours in a week to receive digest. In this case, the issue changes will not be collected for a digest.
The settings are the same as in Global Digest Configuration
Personal Configuration settings override global digest settings for a specific user they are specified.
The only exception is Enable Digest Email setting: if an admin switches off digest emails, users will not be able to switch it on in their personal configuration settings.