PowerShellでOutlook on the Webを使えなくする

PowerShellのコマンドで Outlook on the Webを全員まとめて使えなくする

PS C:\>Get-Mailbox | Set-CASmailbox -OWAEnabled $False

逆に全員まとめて使えるようにするときは

PS C:\>Get-Mailbox | Set-CASmailbox -OWAEnabled $True

PowerShellを終了する前には　Remove-PSSession $Session　を忘れずに。

(後で編集）

https://docs.microsoft.com/en-us/powershell/exchange/exchange-online-powershell-v2?view=exchange-ps

https://docs.microsoft.com/en-us/powershell/exchange/connect-to-exchange-online-powershell?view=exchange-ps

Install-Module -Name ExchangeOnlineManagement

Import-Module ExchangeOnlineManagement; Get-Module ExchangeOnlineManagement
Update-Module -Name ExchangeOnlineManagement

Import-Module ExchangeOnlineManagement

Connect-ExchangeOnline -UserPrincipalName navin@contoso.com -ShowProgress $true

—-
Import-Module ExchangeOnlineManagement

$UserCredential = Get-Credential

Connect-ExchangeOnline -Credential $UserCredential -ShowProgress $true

Disconnect-ExchangeOnline