@保羅 歐 Thank you for reaching out to us, could you provide more details related to your query, the above ask is not clear.
If you are looking for details on Decommission Azure AD Connect V1, you can refer to this - https://learn.microsoft.com/en-us/entra/identity/hybrid/decommission-connect-sync-v1 on how to migrate to V2 has been documented here - https://learn.microsoft.com/en-us/entra/identity/hybrid/decommission-connect-sync-v1#:~:text=the%20provisioning%20agent%3F-,Migrating%20to%20Microsoft%20Entra%20Connect%20V2,-If%20you%20aren%27t
If the above information doesnt help, please provide more details on your ask so that we can help you further.