Notification emails are not sent out to a Group mail address for Internal Activities.
ALLOW_INTERNAL_GROUP_NOTIFY is not set to "Yes" in NX.env file.
Run the following commands to install or change the variable.
pdm_options_mgr -c -s ALLOW_INTERNAL_GROUP_NOTIFY -v yes -a pdm_option.inst
To avoid losing the change when you run pdm_configure, please run the above command with the '-t' flag as follows:
pdm_options_mgr -c -s ALLOW_INTERNAL_GROUP_NOTIFY -v yes -a pdm_option.inst -t
After running the above commands, restart the Service Desk service to take effect the change.