Azure AD password not set

Hello,

In Azure AD synch project we try to  push the creation of Azure AD accounts. We have some persons in IAM with empty password (CentralPassword=null).

When the provisionning is launched for them, it fails with this error : The value of 'Password' on 'Azure Active Directory user account' did not match the password policy restrictions of 'One Identity Manager password policy'.

We effectively set up some password policies to prevent provisionning with null or empty password in different target systems.

But in the case of Azure AD, we would like to bypass this by setting a default password for Azure AD Account if   (CentralPassword=null).

I have set up this the AADUser Table , "Password" colomn where in 'Value calculation' , we did this: 

If String.IsNullOrEmpty($FK(UID_Person).CentralPassword$) Then
value = "Default_pass34$)"
End If

But it still fails with the same error : The value of 'Password' on 'Azure Active Directory user account' did not match the password policy restrictions of 'One Identity Manager password policy'.

I can't see what is missing..

How could we force to set up default password in this case ?

Thnx