Getting users and group

ADumith So, you want to see all groups per user in a CSV file? The Get-ADGroupMember is a good tool for that. You could use this as an example, and I added remarks to it to indicate what is happening where

#Retrieve all users from Active Directory, including the Memberof attribute, and start collecting data to the $total variable. Set the resultsetsize to 10000 for larger environments
$total = foreach ($user in Get-Aduser -Filter * -ResultSetSize 1000 -Properties Memberof) {
    #Get all groups for the user from the Memberof attribute
    foreach ($group in $user.Memberof) {
        #Continue if the user has groups and skip if not
        if ($null -ne $group) {
            #Create a PSCustomObject containing the username and the Name of the Group instead of the DistinGuishedName
            [PSCustomObject]@{
                SamaccountName = $user.SamAccountName
                GroupName      = (Get-ADGroup -Identity $group).Name
            }
        }   
    }
}

#export data from the $total variable sorted on SamAccountName and GroupName to a .csv file in c:\scripts
$total | Sort-Object SamAccountName, GroupName | Export-Csv -NoTypeInformation -Encoding UTF8 -Delimiter ',' -Path c:\scripts\users_and_groups.csv