Microsoft Teams: Manage who can use @mention

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With the recent announcement of raising the maximum team membership limit from 2500 users to 5000 users, I think that it becomes important to learn how to restrict who can use @MentionYourTeam.

Note: Any Team owner can modify your Team settings.

To restrict whom can use @Team and @Channel mention:

  • Open your Team client and select a Team
  • Click on the ellipsis (…) on the right of the name of your team
  • Click on Manage Team

In Team Settings

  • Click on Settings
  • In the @mentions section remove the check mark next to: “Show members the option to @team” to restrict the use of @MentionTeam


Office 365 Off-boarding made easier

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Microsoft is making it easier to make decisions for the off-boarding process of Office 365 users by providing a Guided workflow for deleting Microsoft 365 users.

From the Office 365 Admin center when you delete a user you will now find available options about what to do with licences, about granting access to another user to the OneDrive for Business or the mailbox and turning on automatic replies on the mailbox.

It’s a simple thing that helps admin to make the right decisions when a user is no longer required in your organisation.

Microsoft says it will keep improving the guided workflow. 

Our goal is to provide timely, concise help directly within the context of the admin center so that you can deliver the highest possible service quality to your end user. Look for more actionable intelligence and guided workflows as we continue to improve the Microsoft 365 admin experience. To stay up to date on the latest news and features for Microsoft 365, join the conversation in the Microsoft 365 Tech Communities and on Twitter.



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Visibility of Private Microsoft Teams

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You will have to be carefull if you think that a private Team should be private, meaning that no-one should see it. A user needs to be invited or approved to see the content of a private Team. A new change to Office 365 will make the private teams discoverable via search and Suggested Teams. If you have private teams with sensitive information in Nams or Description you might want to tell your users to rename them. See below.

Note : It might be already like this on your tenant…

Major update: General Availability rollout started

Applied to: All customers


Starting March 23, 2018, private teams will be searchable in Microsoft Teams. This feature update will make it easier for people to share and join Teams.

[How does this affect me?]
Until now, it was not possible for users to find and request access to a private team in the Teams app. Users had to either be invited to a team or search for the underlying group in Outlook in the Outlook app.

Now, private teams will be discoverable via search and the Suggested teams gallery, making it easier to share and discover private teams across an organization. If a user requests to join a private team, the team owner will receive a notification and can approve or deny the request directly in Teams.

[What do I need to do to prepare for this change?]
We recommend that you inform team owners about this change. If team names or descriptions include sensitive information, team owners may want to update them before this change occurs on March 23, 2018.

If you wish to hide a private team or group, Office 365 admins can use the Set-UnifiedGroup PowerShell cmdlet to hide specific groups or teams
(in Outlook, Outlook Web App, and Microsoft Teams). Specifically, use the HiddenFromAddressListsEnabled parameter, which you can apply to individual groups. For further instructions, please click Additional Information below.

Azure AD Guest Limited Access or not?

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This is a first of a few article that I will write about Office 365/Azure AD Guest Access.

Allowing access to Office 365 content (OneDrive, SharePoint, Teams, Groups, Planner, PowerBi, etc) is a cool, but it can become a nightmare when you deal with highly confidential or sensitive documents.

Don’t get me wrong some people were making nightmare about these documents before the venue of Office 365.

In the series of article, I will try to demystify guest access and help you understand the different settings/options available to grant access to Office 365 to Guest or External Users.

Let’s start with guest access control in Azure AD.

In the Azure Active Directory Admin Center, you have some control of what External users/Guest can do.

One of the setting allows you to make sure that Guest users permissions are limited.

The description says:

Yes means that guests do not have permission for certain directory tasks, such as enumerate users, groups or other directory resources, and cannot be assigned to administrative roles in your directory.

No means that guests have the same access to directory data that regular users have in your directory.


In fact, an administrator can go to Azure AD and assign an administrative role to a guest even if you say Yes to Guest users permissions are limited.

I have opened a ticket with Microsoft Support and they told me that this is a design behavior as of now.

Don’t be mislead by this setting and make sure your Azure AD administrator understand that it does not do as it says, yet…

Microsoft Teams at MITPro

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mitproOn Thursday November 30th, come an join us at the MitPro Usergroup at Microsoft Montréal (2000 McGill College, 5th Floor) at 18:00 where I will be presenting a session on Microsoft Teams.  You can signup at


SharePoint Online Attention views being rolled out

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During the Microsoft Ignite 2017 in Orlando, It was announced that SharePoint Online will include Attention views.

Attention views provides a way to quickly take action on items in your library that need attention Ex : Required metadata.

Here is a preview of the attention view that was shown by Lincoln DeMaris (Principal program Manager at Microsoft) during the Microsoft Ignite 2017.

Attention Views are being rolled out to a tenant near you for the First Release customers.

Prepare your training materiel and your help desk!

To learn more about attention view you can watch this Microsoft Ignite Session.

This is where I took the print screen for this article.

Configuring Adding external users to Microsoft Teams

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We can now add external users to Microsoft Teams.

The restriction, for now, is that the external user needs an Office 365 account.

  • The Office 365 account does not need to be in your tenant.
  • External user invitation is not turned on by default.

To allow external users to be members of a team you need to :

Sign in to your Office 365 administration portal with a administrator’s account

In the Office 365 administration portal

On the left bar

  • Click on Settings
  • Click on Services & Add-Ins

In the list of services

  • Click on Microsoft Teams

In the Settings by user/license type section of the Microsoft Teams configurations

  • Click on the arrow next to Business & Enterprise

In the choice’s box

  • Click on Guest

Once guest is selected make sur that the switch is On for the option to Turn Microsoft Teams on or off for all users of this type 


Important : This is a global setting. This means that external users will be able to be added to all Microsoft Teams on your tenant.

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