Code to login and logout a user from Office 365

Hi Hanouch,

I would like to start answering your question with a question. :-)  Why do you want/ this need this? Could you give some more context as of why you are creating a custom login/ logout procedure? Perhaps an alternate solution could help you better.

If a (your) workspace environment is setup correctly (using for example SSO) users are logged in automatically into Office 365, no code is necessary. 

But if you want to FORCE logout a certain user(s), the following might help you on your way:

• Browser/ UI
  • In Office 365 Admin center, use the following the following steps.
    Office 365 Admin Center
    Users -> Active Users ->Select the User and in the OneDrive settings, click Initiate sign out
• Powershell
  • Import-Module MSOnline
    $cred = Get-Credential
    Connect-MsolService -Credential $cred
    Connect-SPOService -Url <add you office365 SPO admin url here> -Credential $cred
    # To get all enabled users
    $users = Get-MsolUser -EnabledFilter EnabledOnly -All
    # To get all the users
    #$users = Get-MsolUser;
    foreach ( $user in $users){
        Revoke-SPOUserSession -user $user.UserPrincipalName -Confirm:$false
    }

Note:

The user(s) that you FORCE logout can immediately log back in unless you have blocked their account. Also when using the Powershell option you need to be Global admin.

Hope this helps and I'm looking forward in reading some more context as of why you would want to write such a script.