Hello, there is a password recovery at the startup, you can see at pag 78 in this documentation [URL]   Please can you try?   ThanksMarco  
Hello, I recently got dell switch 5524P for free and I wanted to factory reset it, so i can configure it. The problem is that I can't factory reset it. I cannot join via telnet or ssh because I don't know the username and password. And the cherry on top... this switch doesn't have serial cable.    Thanks
pls help Hard/Factory reset dell switch 5524P