Hi Readers,
I am sharing a script that we have written to read the registry from multiple servers & provide back results in html table
via email.
example:-
extract the attached zip file from below link & then add the server names in servers.txt file.
https://github.com/vikasSukhija/Downloads
edit the value that you want to read (top of the script)
$main = “Localmachine”
$Path = “System\CurrentControlSet\Services\Disk”
$key = “TimeOutValue”
Define smtp settings
$smtphost = “smtp.lab.com”
$from = “Registry_value@lab.com”
$to = “Vikas.sukhija@lab.com”
Now run the batch file & enjoy the output.
In the next part I will share writing to registry that I have already shared on MS site.
Script Code:-
##########################################################################
# Author:Aishwarya Rawat
# Reviewer: Vikas Sukhija
# Date: 12/26/2013
# Description: Check for Registry Value.
##########################################################################
##################Define variables########################################
$main = “Localmachine”
$Path = “System\CurrentControlSet\Services\Disk”
$key = “TimeOutValue”
####################Define email Variables#################################
$smtphost = “smtp.lab.com”
$from = “Registry_value@lab.com”
$to = “Vikas.sukhija@lab.com”
############################################################################
$report = “.\report.htm”
$servers = Get-content .\servers.txt
$checkrep = Test-Path $report
If ($checkrep -like “True”)
{
Remove-Item “.\report.htm”
}
New-Item “.\report.htm” -type file
################################ADD HTML Content#############################
Add-Content $report “<html>”
Add-Content $report “<head>”
Add-Content $report “<meta http-equiv=’Content-Type’ content=’text/html; charset=iso-8859-1′>”
Add-Content $report ‘<title>Registry Value $Key Status</title>’
add-content $report ‘<STYLE TYPE=”text/css”>’
add-content $report “<!–”
add-content $report “td {”
add-content $report “font-family: Tahoma;”
add-content $report “font-size: 11px;”
add-content $report “border-top: 1px solid #999999;”
add-content $report “border-right: 1px solid #999999;”
add-content $report “border-bottom: 1px solid #999999;”
add-content $report “border-left: 1px solid #999999;”
add-content $report “padding-top: 0px;”
add-content $report “padding-right: 0px;”
add-content $report “padding-bottom: 0px;”
add-content $report “padding-left: 0px;”
add-content $report “}”
add-content $report “body {”
add-content $report “margin-left: 5px;”
add-content $report “margin-top: 5px;”
add-content $report “margin-right: 0px;”
add-content $report “margin-bottom: 10px;”
add-content $report “”
add-content $report “table {”
add-content $report “border: thin solid #000000;”
add-content $report “}”
add-content $report “–>”
add-content $report “</style>”
Add-Content $report “</head>”
Add-Content $report “<body>”
add-content $report “<table width=’50%’>”
add-content $report “<tr bgcolor=’Lavender’>”
add-content $report “<td colspan=’7′ height=’25’ align=’center’>”
#######################Title of table####################################################
add-content $report “<font face=’tahoma’ color=’#003399′ size=’4′><strong>Registry Value $Key Status</strong></font>”
add-content $report “</td>”
add-content $report “</tr>”
add-content $report “</table>”
######################Definae Columns###################################################
add-content $report “<table width=’50%’>”
Add-Content $report “<tr bgcolor=’Lavender’>”
Add-Content $report “<td width=’10%’ align=’center’><B>Server Name</B></td>”
Add-Content $report “<td width=’10%’ align=’center’><B>Value</B></td>”
Add-Content $report “</tr>”
#####Get Registry Value ####
foreach ($Server in $servers)
{
$reg = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey($main, $Server)
$regKey= $reg.OpenSubKey($path)
$Value = $regkey.GetValue($key)
######################Add values inside Columns########################################
Add-Content $report “<tr>”
Add-Content $report “<td bgcolor= ‘GainsBoro’ align=center> <B> $Server </B></td>”
Add-Content $report “<td bgcolor= ‘Aquamarine’ align=center><B>$Value</B></td>”
Add-Content $report “</tr>”
}
#####################Close HTMl Tables###############################################
Add-content $report “</table>”
Add-Content $report “</body>”
Add-Content $report “</html>”
#####Send Email#####
$subject = “Registry Value $Key Status”
$body = Get-Content “.\report.htm”
$smtp= New-Object System.Net.Mail.SmtpClient $smtphost
$msg = New-Object System.Net.Mail.MailMessage $from, $to, $subject, $body
$msg.isBodyhtml = $true
$smtp.send($msg)
#############################################################################################
Regards
Sukhija Vikas
Tech Wizard 
What if the registry key does not exist? Can if write key does not exist to the report?
Have you checked my second post , it can be referred for the query you have
http://msexchange.me/2014/01/04/readwrite-registry-for-multiple-servers-via-powershell-part2/
What if one of the servers is off? Here im still getting a value (a wrong value!) for the servers which are offline.
I will test & Change the code to handle this situation.
I tested it with the servers that are offline, its not picking any value & that is the correct response.
Registry Value TimeOutValue Status
Server Name Value
Server1
Server2
Server3
Server4
Thank you so much for your prompt reply. In my case, if an offline server is between two online servers, then the offline server is picking the values on the online servers.
Server1 – Online
Server2 – Offline
Server3 – Online
>>Value server2 = Value Server1,3
If the Offline server is the last server, then it does not pick any value, just as expected.
Thx for explaining, I will check & fix this.
Thank you very much! It now works fine.
Replace the condition under for loop as(added if else)–> now servers that have error will not be printed in the report.
foreach ($Server in $servers)
{
$reg = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey($main, $Server)
$regKey= $reg.OpenSubKey($path)
$Value = $regkey.GetValue($key)
if($error -ne $null)
{
Write-host “error found for server $Server” -foregroundcolor blue
$error.clear()
}
else
{
######################Add values inside Columns########################################
Add-Content $report “
Add-Content $report “
”
Add-Content $report “
”
Add-Content $report “
”
}
}