Connecting to Office 365 Using PowerShell

More and more the focus is on Office 365, and a lot of the niftier management can/should be done with PowerShell.

Recently, i have been working more and more with Office 365, and connecting to it can be a bit of a pain.

Here, I will demonstrate a couple of ways that you can connect to Office 365 easily, as something you will be doing more and more.

I will also demonstrate a way that you can save the password securely in a separate file, so you don’t have to keep entering it, or have it available in plain text.

Connecting to Office 365 – Prerequisites
Firstly, in order to connect to Office 365 you must have the Windows Azure AD Module for PowerShell installed.

You can find this here:

Connecting to Office 365
A quick Google will give you then commands you need to connect to Office 365 from your new Shell, but i tend to use this set of commands.

#Connect to Office 365, Prompting for Credentials
Import-Module MSOnline
$O365Cred = Get-Credential
$O365Session = New-PSSession –ConfigurationName Microsoft.Exchange -ConnectionUri -Credential $O365Cred -Authentication Basic -AllowRedirection
Import-PSSession $O365Session
Connect-MsolService –Credential $O365Cred

In its most basic form, this will Import the MSOnline powershell module (the one you have just installed) and connect to the Office 365 Service, prompting for your username and password.

This works well, but if you use it often, it can be a pain to keep giving your credentials.

Saving the Password Securely
You can simply add the password to the script, but this will be in plain text, which is not ideal.

To save the password in a more secure fashion, I use the PowerShell script below:

#Set location of TXT file to store the password
$secureFilePath = "D:\365SecureString.txt"

#Enter the password when prompted
#It will be stored in a secure string
Read-Host -Prompt "Enter password to be encrypted in secure string text file" -AsSecureString |
ConvertFrom-SecureString |
#Location of the file to secure the string inside
Out-File $secureFilePath

This will prompt you for a password and save it in a more secure fashion to the file you specify at the top.

Once this file is saved, it can be accessed by any other PowerShell script, simply by reading the file

$pass = GetContent $secureFilePath | ConvertTo-SecureString

Want more on Passwords?
Check out Todd Klindt’s post on using Passwords with PowerShell HERE

Disclaimer on Secure Passwords
Unfortunately, I have to say that there are a couple of ways that this password can be read later on, but only by someone who has the knowledge and access to your file. It will certainly stop someone stumbling upon it.

Putting it together
Now that i have my password stored, you can add this location to the script to connect, and with a couple of tweaks have as script that will connect to Office 365 without any prompting.

Here, I’ve added it as a function. This was, i could save this into my PowerShell Profile so i could access it easily every time I needed it.

Function Connect365 {
    #Location of Password in TXT file
    $secureFilePath = "D:\365SecureString.txt"
    $userName = ""
    $pass = Get-Content $secureFilePath | ConvertTo-SecureString                                                           
    $O365Cred = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $userName,$pass     

    #Function to connect to MSOL using the secure string
    Import-Module MSOnline

    #$O365Cred = Get-Credential
    $O365Session = New-PSSession –ConfigurationName Microsoft.Exchange -ConnectionUri -Credential $O365Cred -Authentication Basic -AllowRedirection
    Import-PSSession $O365Session
    Connect-MsolService –Credential $O365Cred


I’ll cover the use of functions a little more in another blog.

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