PowerShell Basics: How to Force a Full Password Sync in AzureAD Connect

How can i sync a password for single user only?

i can do it in the troubleshoot tool in AAd connect. but i cant find the PS commands to do it?

I have a problem when we create new users, that are disabled..

1. New user = disabled in AD

2. user synced to Azure AD by aad connect.

3. Flag "user must change password next logon" is set. ( here i hoped the Password would allready be synced, but apparently not) 

4. then i enable user

5. Sync again to AAAD

6. User unable to sign in ( no password hash are synced)

7. i try removing  Flag "user must change password next logon", and wait a litle

8. user still not able to sign-in ( no password are synced)

I then found out int he metaverse object log, it says: passwordsync: filteredByTarget.
docu says it is because must change pw flag is set. BUT IT IS NOT

and User account controll says 512 = enabled , and pwdLastSet are a date, and not "0".

And i thinks this is a bug. But any how, i want to manualy sync this users PH to AAD.

Only when i reset the users password it gets synced again, with no other modifications