Find ADusers Grp

#------------------------------+
# Build data foundation        |
# should only include relevant |
# OU's, to speed up process    |
#------------------------------+

$groups = Get-ADGroup -Filter *
$GrpObjects = @()

foreach ($grp in $groups)
{
    $pro = @{
    'Group' = $grp.Name
    'Members' = Get-ADGroupMember -Identity $grp.Name
    }

    $obj = New-Object -TypeName Psobject -Property $pro
    $GrpObjects += $obj
}


#--------------------------------------------------+
# This function find the grps a users is member of |
# possible to expand this to include more stuff    |
#--------------------------------------------------+

function find-users-grp
{
PARAM
(
    [string[]]$SamAccountName
)
    $check = @()
    foreach ($user in $SamAccountName)
    {
        try
        {
            $check += Get-ADUser -Identity $user -ErrorAction stop
        } catch{}
    }

    if ($check.Count -eq 0)
    {
        Write-Host -f Red "Users doesnt exist in AD"
        break;
    }

    foreach ($users in $SamAccountName)
    {
        $out = $GrpObjects | where {$_.Members.SamAccountName -eq $users}
        Write-Host -ForegroundColor Yellow "$users is member of"

        foreach ($item in $out)
        {
            Write-Host $item.Group
        }

        Write-Host ""
    }
}