How to implement employee birthday reminder to personnel?

Question

Active Directory

Good afternoon. The task is this - three days before the employee's birthday, the entire HR department should receive a reminder (message / event) in the mail, how can this be implemented? In which direction to dig?
What we have - AD / Exchange is deployed, employees' birthdays are crammed into the extensionattribute, or you can read it from a file (it doesn't matter).
You can also use third-party software.

Answer 1

how I would do it:
every day using Powershell we collect a list of employees who have a DR in the next 3 days, save it to a file in the form we need
After that, we take the information from the file and send it via smtp-relay to the desired distribution group

Answer 2

And Exchange is not able in a calendar?

Answer 3

Is there no 1C payroll and personnel management? Or, perhaps, in 1C: Accounting, employees are kept? I would make notifications from these bases. At the same time, you won’t need to maintain the database itself, the calculators will do it for you

Answer 4

So right in the settings there is a "Calendar of birthdays" and you don't need to farm anything.

Answer 5

I use the old program BIRTHDAY! millenium 4.12.
The text file is filled with the necessary dates and that's it. The file can be placed on a network share, I have not tried to install it through AD, but I think there will be no problems.