Force a user to re-register with Azure AD Self Service Password Reset

I Found A solution to this :)

# /MWU
# First connect to your tenant (as you use to do it)
# Output from my connect tenant function
# cat function:Connect-O365-PROD

# Actual Connect-O365-PROD function
Get-PSSession | Remove-PSSession
$PROD365Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell-liveid -Credential $PRODAdminCred -Authentication Basic -AllowRedirection
#Use this if you import scriptfunctions from remote server, i only load remote script in my $profile
Import-Module (Import-PSSession $PROD365Session -AllowClobber) -global
Connect-MsolService -Credential $PRODAdminCred
##################Forget above if you are Pro :)#######################################

#Selected user in cloud
$Userpricipalname = "abc@org.com"

#Get settings for a user with exsisting auth data
$User = Get-MSolUser -UserPrincipalName $Userpricipalname
# Viewing default method
$User.StrongAuthenticationMethods

# Creating custom object for default method (here you just put in $true insted of $false, on the prefeered method you like)
$m1=New-Object -TypeName Microsoft.Online.Administration.StrongAuthenticationMethod
$m1.IsDefault = $false
$m1.MethodType="OneWaySMS"

$m2=New-Object -TypeName Microsoft.Online.Administration.StrongAuthenticationMethod
$m2.IsDefault = $false
$m2.MethodType="TwoWayVoiceMobile"

$m3=New-Object -TypeName Microsoft.Online.Administration.StrongAuthenticationMethod
$m3.IsDefault = $false
$m3.MethodType="PhoneAppOTP"

$m4=New-Object -TypeName Microsoft.Online.Administration.StrongAuthenticationMethod
$m4.IsDefault = $True
$m4.MethodType="PhoneAppNotification"

# To set the users default method for doing second factor
#$m=@($m1,$m2,$m3,$m4)

# To force user ONLY to re-register without clearing their phonenumber or App shared secret.
$m=@()

# Set command to define new settings
set-msoluser -Userprincipalname $user.UserPrincipalName -StrongAuthenticationMethods $m

#Settings should be empty, and user is required to register new phone number or whatever they like, i case they lost their phone.
$User = Get-MSolUser -UserPrincipalName $Userpricipalname
$User.StrongAuthenticationMethods