![]() ![]() It can take up to 15 minutes before the user can sign into all apps. When this happens, browsers and apps receive new valid tokens. You can also force a sign-out for an account with PowerShell by running the Revoke-AzureADUserAllRefreshToken cmdlet: Revoke-AzureADUserAllRefreshToken -ObjectId sign-ins for an account sets RefreshTokensValidFromDateTime to the current date and time and AccountEnabled to True. The Microsoft 365 admin center includes an option to sign a user out of all sessions, so you can do this without blocking an account. The effect is to invalidate the refresh tokens issued to applications for a user and tokens issued to session cookies in browsers and forces the user to reauthenticate to continue using the apps. Forcing Sign-Outs from Appsīlocking an account from signing in also sets the RefreshTokensValidFromDateTime property for the account to the date and time the action occurred. When an account is disabled, the user cannot sign into their Azure AD account:įigure 2: A user is blocked from signing into their Azure AD account. Figure 1: Blocking a user’s Azure AD account in the Microsoft 365 admin center.īlocking the account sets the AccountEnabled property in Azure AD to False. This can be done through the Microsoft 365 admin center by selecting the account and choosing Block sign-in (Figure 1). The classic method to block access is to block someone’s Azure AD account. Teams, Planner, Yammer, SharePoint Online, and OneDrive for Business all consume hours if people allow. Stopping Access to Office 365Įmail is not the only app which steals time over the weekend. In reality, if you’re serious about controlling mobile devices, you need to deploy a mobile device management (MDM) solution like Intune which allows you to r emote wipe corporate data from the device when necessary. These notifications keep on arriving after you disable the sync protocol. ![]() The notifications contain snippets about new messages to allow users to decide if they need to read the full message. You can disable the Microsoft sync technology to stop clients sending messages and downloading messages to the device, but both iOS and Android use services to notify users of the arrival of new messages. The weakness of concentrating on disabling protocols is that some information leakage can still occur. In fact, for completeness, you should also disable the IMAP4 and POP3 protocols to close off any chance that a mobile device can connect to a mailbox. If you don’t disable both, you create a situation where a user can still connect to their mailbox with a different app. Why disable both protocols? Outlook mobile uses the Microsoft sync technology to enable many advanced features like delegate access to mailboxes, but other clients like the mail apps included in the iOS and Android operating systems use EAS for basic email connectivity with Exchange Online. Set-CASMailbox -Identity -OutlookMobileEnabled:$False In this example, we disable mobile connectivity for a mailbox for both Exchange ActiveSync (EAS) and the Microsoft sync technology used by Outlook mobile: Set-CASMailbox -Identity -ActiveSyncEnabled:$False Over the years, different techniques have evolved, originally for email connectivity because that’s where the problem first surfaced.īecause Exchange Online supports a rich set of connectivity protocols for mailboxes, you can disable individual protocols by running the Set-CASMailbox cmdlet. It also applies when people leave a company. The issue of disabling service to users isn’t just about stopping people working over the weekend or when they are on vacation. Stopping Email Connections Temporarily or Permanently The net effect of CAE is that depriving user access to an account works much faster (almost immediately). Update: Microsoft has implemented continual access evaluation (CAE) for critical events like password changes or account blocks in all tenants. Now, the advance of time and development in technology combine to make it reasonable to revisit the problem. Some worked more, some worked less, and the line between personal and work time blurred. In places other than France, the need to preserve space between personal and work time became more evident as the Covid-19 pandemic forced many people to work from home. Four years ago, I considered the problem in a article inspired by a French law to allow people to disconnect over the weekend. Multiple Techniques Available to Stop People ConnectingĪ recent article about using PowerShell to control Azure AD conditional access policies caused me to start thinking about the techniques used to block user access to Office 365. Changing Conditional Access Policy Conditions.Controlling Conditional Access Policies with PowerShell.Stopping Email Connections Temporarily or Permanently.Multiple Techniques Available to Stop People Connecting. ![]()
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