In our company, we have several Macs and Macbooks. They aren't used anymore, so we want to sell them. The IT department said that we don't know about erasing the devices securely. So, I'm searching for the information about the sign-out before erasing the data in the disks. Erasing is OK but signing out the accounts is really a mess :(
All devices have the same admin account and I can open that admin account on every device (but the linked Apple account is unreachable, I cannot sign out the AppleID, maybe IT can create the linked email address and I can press the Forgot Password option, to get a new Apple account password for that account). Old employees have a standard account on the devices. They didn't sign out before leaving the company and we don't know the passwords for standard accounts. So, is it possible to sign out them via the admin account? or just remove them and sign out from the admin account.
When I search the forums, it mentions only one account. If someone gives an option, it will be really helpful.