How to connect to Microsoft Exchange Online using PowerShell

Step 1:

The first thing you need to do is to install ExchangeOnlineManagement module for PowerShell.

Install-Module -Name ExchangeOnlineManagement -RequiredVersion 3.1.0

Installation logs..

Untrusted repository
You are installing the modules from an untrusted repository. If you trust this 
repository, change its InstallationPolicy value by running the Set-PSRepository
 cmdlet. Are you sure you want to install the modules from 'PSGallery'?
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help 
(default is "N"):y
Installing package 'ExchangeOnlineManagement…

Step 2

Now let's connect to ExchangeOnlineManagement,

Connect-ExchangeOnline

This shall open up the web browser and ask you to log in to your Office.com account.

Once you Authenticate (may require MFA if enabled) you will see this message.

Authentication complete. You can return to the application. Feel free to close this browser tab.

And you should get a message on the console.

Let's see if we are connected to ExchangeOnline,

PS /Users/c2ctechtv> Get-OrganizationConfig | Format-Table -Auto Name, ServicePlan, TenantGuid

Name                          ServicePlan       TenantGuid
----                          -----------       ----------
code2care-xx.onmicrosoft.com BPOS_S_E15_0_Slim 

If you want to disconnect with ExchangeOnline, run the below on the PowerShell Terminal.

Disconnect-ExchangeOnline