In larger companies, it is common to have a directory service that keeps track of employees. One company had an internal service called “epitaphs” where entries for employees would appear after they left the company. Other employees could add comments to these entries. It was interesting that you couldn’t write your own epitaph; someone else had to add it. At another company, there was no periodic update available, so the author decided to create their own. They set up a cron job that compared the current employee list to the previous one and logged any changes. This allowed people to keep tabs on who was still working there. Surprising and bizarre things sometimes showed up in the log. This approach is not perfect and can result in false alarms or missed updates. However, if someone gets mad about this tool, it might not be a good place to work anyway.
https://rachelbythebay.com/w/2024/02/08/ldap/