Posh365

0.3.5

Public/Connect/Connect-Exchange.ps1

function Connect-Exchange {
    param (
        [Parameter(Mandatory = $False)]
        $ExchangeServer,
        [Parameter(Mandatory = $False)]
        [Switch] $NoPrefix,
        [Parameter(Mandatory = $False)]
        [Switch] $DeleteExchangeCreds,
        [Parameter(Mandatory = $False)]
        [Switch] $ViewEntireForest
    )

    $RootPath = $env:USERPROFILE + "\ps\"
    $KeyPath = $Rootpath + "creds\"
    $User = $env:USERNAME

    while (!(Test-Path ($RootPath + "$($user).EXCHServer"))) {
        Select-ExchangeServer
    }
    $ExchangeServer = Get-Content ($RootPath + "$($user).EXCHServer")
    
    # Delete invalid or unwanted credentials
    if ($DeleteExchangeCreds) {
        Try {
            Remove-Item ($KeyPath + "$($user).ExchangeCred") -erroraction stop
        }
        Catch {

        }
        Try {
            Remove-Item ($KeyPath + "$($user).uExchangeCred") -erroraction stop
        }
        Catch {
            
        }
        
    }
    # Create KeyPath Directory
    if (!(Test-Path $KeyPath)) {
        try {
            New-Item -ItemType Directory -Path $KeyPath -ErrorAction STOP | Out-Null
        }
        catch {
            throw $_.Exception.Message
        }           
    }
    if (Test-Path ($KeyPath + "$($user).ExchangeCred")) {
        $PwdSecureString = Get-Content ($KeyPath + "$($user).ExchangeCred") | ConvertTo-SecureString
        $UsernameString = Get-Content ($KeyPath + "$($user).uExchangeCred")
        $Credential = Try {
            New-Object System.Management.Automation.PSCredential -ArgumentList $UsernameString, $PwdSecureString -ErrorAction Stop 
        }
        Catch {
            if ($_.exception.Message -match '"userName" is not valid. Change the value of the "userName" argument and run the operation again') {
                Connect-Exchange -DeleteExchangeCreds
                Write-Host "********************************************************************" -foregroundcolor "darkblue" -backgroundcolor "white"
                Write-Host " Bad Username " -foregroundcolor "darkblue" -backgroundcolor "white"
                Write-Host " Please try your last command again... " -foregroundcolor "darkblue" -backgroundcolor "white"
                Write-Host "...you will be prompted to enter your Office 365 credentials again. " -foregroundcolor "darkblue" -backgroundcolor "white"
                Write-Host "********************************************************************" -foregroundcolor "darkblue" -backgroundcolor "white"
                Break
            }
        }
    }
    else {
        $Credential = Get-Credential -Message "Enter a username and password for ONPREM EXCHANGE"
        if ($Credential.Password) {
            $Credential.Password | ConvertFrom-SecureString | Out-File ($KeyPath + "$($user).ExchangeCred") -Force
        }
        else {
            Connect-Exchange -DeleteExchangeCreds
            Write-Host "********************************************************************" -foregroundcolor "darkgreen" -backgroundcolor "white"
            Write-Host " No Password Present. " -foregroundcolor "darkgreen" -backgroundcolor "white"
            Write-Host " Please try your last command again... " -foregroundcolor "darkgreen" -backgroundcolor "white"
            Write-Host "...you will be prompted to enter your Office 365 credentials again. " -foregroundcolor "darkgreen" -backgroundcolor "white"
            Write-Host "********************************************************************" -foregroundcolor "darkgreen" -backgroundcolor "white"
            Break
        }
        $Credential.UserName | Out-File ($KeyPath + "$($user).uExchangeCred")
    }    
    $Session = New-PSSession -Name "OnPremExchange" -ConfigurationName Microsoft.Exchange -ConnectionUri ("http://" + $ExchangeServer + "/PowerShell/") -Authentication Kerberos -Credential $Credential
    If (!$NoPrefix) {
        $SessionModule = Import-PSSession -AllowClobber -DisableNameChecking -Prefix 'OnPrem' -Session $Session
        $Null = Import-Module $SessionModule -Global -Prefix "OnPrem" -DisableNameChecking -Force

        Write-Host "********************************************************************" -foregroundcolor "darkgreen" -backgroundcolor "white"
        Write-Host " You are now connected to On-Premises Exchange " -foregroundcolor "darkgreen" -backgroundcolor "white"
        Write-Host " All commands are pre-pended with OnPrem, for example: " -foregroundcolor "darkgreen" -backgroundcolor "white"
        Write-Host " Get-Mailbox is Get-OnPremMailbox " -foregroundcolor "darkgreen" -backgroundcolor "white"
        Write-Host " This is to prevent overlap of commands between Office 365 and EXO " -foregroundcolor "darkgreen" -backgroundcolor "white"
        Write-Host " For example, Get-Mailbox would be used for Office 365 while, " -foregroundcolor "darkgreen" -backgroundcolor "white"
        Write-Host " Get-OnPremMailbox would be used for On-Premises Exchange " -foregroundcolor "darkgreen" -backgroundcolor "white"
        Write-Host "********************************************************************" -foregroundcolor "darkgreen" -backgroundcolor "white"
    }
    else {
        $SessionModule = Import-PSSession -AllowClobber -DisableNameChecking -Session $Session
        $Null = Import-Module $SessionModule -Global -DisableNameChecking -Force
        Write-Host "********************************************************************" -foregroundcolor "darkgreen" -backgroundcolor "white"
        Write-Host " You are now connected to On-Premises Exchange " -foregroundcolor "darkgreen" -backgroundcolor "white"
        Write-Host "********************************************************************" -foregroundcolor "darkgreen" -backgroundcolor "white"
    }
    

    if ($ViewEntireForest) {
        Set-ADServerSettings -ViewEntireForest:$True
    }
}