I want to impersonate user when I access Microsoft SQL Server from powershell

Question

Hi,
Actually I have to perform some SQL operation on my MSSQL server database. but problems is that I have given all credentials (windows fix login/password which can access database) in connection string. but when I execute the script then it is always using
my windows login and password and then giving error that not able to connect with it.
My personal windows credentials does not have access to my enterprise database that is why I am using service ID.
I came to know that I have to do user impersonation of user when i access database but how to do that?? can you guys give me the syntax for that as i have to perform all sql operation using impersonation.
Please reply me as soon as possible as i stuck since long
Vipul Mistry Sr. Embedded Engineer www.eInfochips.com

Answer 1

Hi Guys,
thanks a lot for your support and replies but I found the solution. With below code i was able to do my task and I used $AuthType =3 for my purpose. Hope this will help others also.
$varDBServer = "N0SQL104,1675"
$varDBInstance = ""
$varDBSchema = "Data_Dev"
$varDBUser = "S0060VMSD"
$varDBPassword = "SDCFG345D"
#### Choose authentication type (0=SSO, 1= SQL, 2=Domain)
$AuthType = 3
#### Load the required assembly for sql server administration
#### Requieres SQLServerNativeClient, SQLSysClrTypes and SharedManagementObjects
[reflection.assembly]::LoadWithPartialName("Microsoft.SqlServer.Smo") | Out-Null
$varSQLServer = New-Object -typeName Microsoft.SqlServer.Management.Smo.Server -argumentList "$varDBServer\$varDBInstance"
switch ($AuthType) {
1 {
#### Access the SQL-Server with your current credentials (pass-through)
$varSQLServer.ConnectionContext.LoginSecure = $true
2 {
#### Access the SQL-Server with SQL-Server credentials in mixed mode authentications
$varSQLServer.ConnectionContext.LoginSecure = $false
$varSQLServer.ConnectionContext.Login = $varDBUser
$varSQLServer.ConnectionContext.Password = $varDBPassword
3 {
#### Access the SQL-Server with given domain user credentials
$varSQLServer.ConnectionContext.LoginSecure = $true
$varSQLServer.ConnectionContext.ConnectAsUser = $true
$varSQLServer.ConnectionContext.ConnectAsUserName = $varDBUser
$varSQLServer.ConnectionContext.ConnectAsUserPassword = $varDBPassword
} default {
Write-Host "Please select an authentication type: 0=SSO, 1= SQL, 2=Domain"
exit -1
#### Try connection to SQL-Server with given parameters
Write-Host "`nTry connection to SQL-Server with given parameters`n"
try {
$varBuildOfSQLServer = $varSQLServer.Version.get_Build()
Write-Host "Build of SQL-Server '$varDBServer' is $varBuildOfSQLServer"
} catch {
Write-Host "ERROR: Cannot access SQL-Server '$varDBServer'. Exit script!"
exit –1
Vipul Mistry Sr. Embedded Engineer www.eInfochips.com