Powershell - write User to CSV, explicitly exclude part of the User from any action

Hi,

In the Script posted below i marked the steps where i need help e.g. ### Question No. 1###

1. What is the best way to write only the USERIDs of the DB "*WEB*" to an
external CSV at this step?

2. Is there a way to exclude the User which are stored in Database (*WEB*) from the action should taken below, after identify them and write to an external file
or must be  this user explicitly exclude from any action before it should taken?

for example: ($_.Version -eq "MSXC2010" -and $_.action -eq "New" -and $user_db -notlike "*WEB*")

Import-Module ActiveDirectory 
ForEach ($User in  Import-Csv "c:\import.csv"){ #$user}
switch($user){
		         
{$_.Version -eq "MSXC2010" -and $_.aktion -eq "new"} {

			
$user_dept = (Get-ADUser -identity $user.UserID).department
$user_db = (Get-Mailbox -Identity $user.userid).Database
			
			
if($user_db -notlike "*WEB*" -and $user_dept -like "EMC") {
					
$db = "DBEMC0$("{0:00}" -f (1..43 | Get-random))"
           
Enable-Mailbox -Identity $user.UserId $DB  #here should enable all user in department EMC to Database DBEMC0 - DBEMC043

### Question No. 1 ####
}elseif ($user_db -like "*WEB*" | Out-File "c:\Temp\webUser.csv") {   #here write userids database web to a file

### Question No. 2 ####
		
		    }elseif ($user_dep -notlike "*EMC*" -and $user_db -notlike "*WEB*") {  # all user not department EMC and not Database WEB should be enable here
            
            Enable-Mailbox -Identity $user.UserId


                  }
                  else { 

                  $mbox = Get-Mailbox -Identity $User.userid
                  $mbox.EmailAddresses = $user.userid + "@emc.de"
                  $mbox.EmailAddresses+="MRS:$($user.userid)@MRS"
                  Set-Mailbox -Identity $User.userid -EmailAddresses $mbox.Emailaddresses -EmailAddressPolicyEnabled $False
                  
                     
              
   switch($user.company){
					"LCA*" {Set-Mailbox -Identity $User.userid -CustomAttribute4 'T' -CustomAttribute10 'LCA' -CustomAttribute14 'vcom'}
					"LCG*" {Set-Mailbox -Identity $User.userid -CustomAttribute4 'K' -CustomAttribute10 'LCG' -CustomAttribute14 'vcom'}
					"LCY*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'LCY' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
					"LCT*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'LCT' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
					"LCP*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'LCP' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
                    "LTC*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'LTC' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
                    "LVT*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'LVT' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
                    "LCN*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'LCN' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
                    "BTL*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'BTL' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
                    "BTM*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'BTM' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
                    "BTS*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'BTS' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
                    "DTN*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'DTN' -CustomAttribute4 'R' -CustomAttribute14 'vcom'}
                    "KPA*" {Set-Mailbox -Identity $User.userid -CustomAttribute10 'KPA' -CustomAttribute4 'R'  -CustomAttribute14 'vcom'}
                    default {Set-Mailbox -Identity $User.userid -CustomAttribute10 'EMC' -CustomAttribute4 'R' -CustomAttribute13 'vcom'}
}

                    $descnew = $user.orderid
                    $desccurrent = (Get-ADUser -identity $user.userid -Properties Description).Description
                    set-aduser -identity $user.userid -description ($desccurrent+"/"+$descnew+" ")
                  }
   			
			}
		{$_.Version -eq "MSXC2010" -and $_.action -eq "delete"} { 
		   
		   $dbnew = (Get-Mailbox -Identity $user.userid | Select-Object Database)
		   $desccurrent = (Get-ADUser -identity $user.userid -Properties Description).Description
           set-aduser -identity $user.userid -description ($desccurrent+"/"+$dbnew+" ")
		
			#disable mailbox exchange 2010
		   	Disable-Mailbox -Identity $user.UserID -confirm:$false
 
           
                  }
                 
                  }
           
              
            
                                # If ($_.Version -eq "MSXC2010" -and $_.action -eq "New") { 
                                {$_.Version -eq "MSXC2010" -and $_.aktion -eq "AdAccount"}  {
                              
                                $NewPassword = $user.UserId.Insert(5,"$")
                                $NewPassword = $newPassword.Insert(3,"L")
                                $NewPassword = $newPassword.Remove(0, 1)
                                $newPassword = $newPassword.Insert(0,"Z")        
                                Set-ADAccountPassword -Identity $user.UserId -Reset -NewPassword (ConvertTo-SecureString -AsPlainText $newPassword -Force) 
                                write-host -ForegroundColor magenta "Password of $($user.UserId) has been set to $newPassword"
                              
                                "User {0}  Last PW Reset at {1}" -f $user.userid,((Get-ADUser $user.userid -properties PasswordLastSet).PasswordLastSet)

                                }
                               
                              
                                {$_.Version -eq "MSXC2010" -and $_.aktion -eq "New"} {
                               
                                
                                $PW = (Get-ADUser -identity $user.userid -properties * ).CannotChangePassword
                                If ($PW -eq $false) {
                                $GROUP = (Get-ADUser -identity $user.userid -Properties *).MemberOf | % { ($_ -split ",")[0] } | Where { $_ -like "CN=E*" }
                                If (!($GROUP)) {
                               
                                $NewPassword = $user.userid.Insert(5,"$")
                                $NewPassword = $newPassword.Insert(3,"L")
                                $NewPassword = $newPassword.Remove(0, 1)
                                $newPassword = $newPassword.Insert(0,"Z")        
                                Set-ADAccountPassword -Identity $user.userid -Reset -NewPassword (ConvertTo-SecureString -AsPlainText $newPassword -Force) 
                                write-host -ForegroundColor yellow "Password of $($user.UserId) has been set to $newPassword"
                              
                                "User {0}  Last PW Reset at {1}" -f $user.userid,((Get-ADUser $user.userid -properties PasswordLastSet).PasswordLastSet)
                              
                                }                                          
                           
                                }
                                

appreciate for your help
Mandy