Class CustomAdInfo {
    $UserName
    $Group
    $Email
    $Manager
}

[char] 'y'..[char] 'z' | ForEach-Object {
    $getADUserSplat = @{
        Filter         = "Name -like '$_*'"
        Properties     = 'SamAccountName', 'memberOf', 'EmailAddress', 'Manager'
        ResultPageSize = 256
        SearchBase     = 'CN=Users,DC=ab,DC=cd'
    }
    foreach ($user in Get-ADUser @getADUserSplat) {
        foreach ($group in $user.MemberOf | Get-ADGroup) {
            [CustomAdInfo]@{
                UserName = $user.SamAccountName
                Group    = $group.Name # <= You need to choose an attribute here
                Email    = $user.EmailAddress
                Manager  = $user.Manager
            }
        }
    }
} | Export-Csv 'C:UsersDownloadsMembers_and_Groups.csv'

Above code returns Field Manager value as CN=manager-id,CN=Users,DC=ab,DC=cd in csv. Manager field is bound by CN user type and Domain details. Expectation is to replace these, extract only manager-id from the string and assign it to class property Manager. Am a beginner, couldn’t find anything helpful on the internet. Anyone could help me here?