Apex to send password reminder emails to users before the expiry day.

Assumptions:
1) Password will expire in 90 days.
2) Reminder will be sent before 1 day.

	global class PasswordExpiryReminder implements Schedulable {
	global void execute(SchedulableContext sContext) {
	sendNotificationMail();
	}
	global void sendNotificationMail() {
	try{
	Messaging.SingleEmailMessage[] theEmails = new List < Messaging.SingleEmailMessage > ();
	OrgWideEmailAddress fromMailAddress = [SELECT Id FROM OrgWideEmailAddress WHERE DisplayName='Do Not Reply'];
	List < User > nUser = [SELECT ID, email, LastPasswordChangeDate FROM User WHERE isActive = true AND LastPasswordChangeDate != NULL AND LastPasswordChangeDate != NULL];
	List<EmailTemplate> eMailTemplate = [Select Id,Name from EmailTemplate WHERE Name = 'Password Expiry Notice for Last day'];
	ID eMailTemplate1;
	for(EmailTemplate et:eMailTemplate){
	if(et.Name=='Password Expiry Notice for Last day'){
	eMailTemplate1 = et.id;
	}
	/*
	use else if incase of multiple templates
	*/
	}
	for (User tempUser: nUser) {
	Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
	Integer daysLeft = (90 - tempUser.LastPasswordChangeDate.date().daysBetween(System.today()));
	if(daysLeft == 1) { //Code to prepare mails before 1 days
	mail.setOrgWideEmailAddressId(fromMailAddress.Id);
	mail.setTargetObjectId(tempUser.Id);
	mail.setTemplateId(eMailTemplate1);
	mail.saveAsActivity = false;
	theEmails.add(mail);
	}
	/*
	Use else if incase of multiple reminders
	*/
	}
	Messaging.Email[] allMails = new List < Messaging.Email > ();
	If(theEmails.size() <> 0 && !theEmails.isEmpty()) {
	for (Integer j = 0; j < theEmails.size(); j++) {
	allMails.add(theEmails.get(j));
	}
	}
	If(allMails.size() <> 0 && !allMails.isEmpty()) {
	Messaging.sendEmail(allMails); //Sending Emails to the Users
	}
	}
	Catch(Exception E){
	E.getMessage();
	}
	}
	}

view raw PasswordReminder.cls hosted with ❤ by GitHub