AAD Domain: bad condition in Set-TargetResource

[FJanneau]

Description of the issue

Bug in line 248:
The following condition is always true.
if (-not [System.String]::IsNullOrEmpty('PasswordNotificationWindowInDays'))

It should test the variable, not the string:
if (-not [System.String]::IsNullOrEmpty($PasswordNotificationWindowInDays))

Microsoft 365 DSC Version

V1.25.305.1

Which workloads are affected

Azure Active Directory (Entra ID)

The DSC configuration

Verbose logs showing the problem

Environment Information + PowerShell Version