slmgr.vbs Command Cheat Sheet

Installation:
  slmgr /ipk <key>     Install product key
  slmgr /upk           Uninstall product key
  slmgr /cpky          Clear key from registry

Activation:
  slmgr /ato           Activate online
  slmgr /dti           Show installation ID (phone)

KMS:
  slmgr /skms <s:p>    Set KMS server
  slmgr /ckms          Clear KMS server

Status:
  slmgr /dli           License info (brief)
  slmgr /dlv           License info (verbose)
  slmgr /xpr           Expiration date

Full reference: https://windowskms.com/slmgr-commands/
Error codes: https://windowskms.com/windows-activation-errors/