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MC376710: Introducing the new Outlook for Windows

We are aware that some users can access an unsupported early test version of the new Outlook for Windows. This version is missing some of the features and enhancements that will be available later for our customers in the Beta Channel. We encourage our customers to wait for the beta version to be released.

MC376710: Introducing the new Outlook for Windows

We recognize the need for tenants to control access to apps in their organizations, so we are releasing early the instructions to do so. We expect to provide more news in the coming weeks about our Beta release. If you would like to block your users from connecting their Microsoft 365 accounts associated with your organization to this new app, please follow the PowerShell instructions. When the beta is available you will need to unblock them using the same instructions.

These instructions prevent the account from syncing to the new Outlook but do not prevent download.

To enable/disable access for a single user

  1. Run the PowerShell app as an administrator
  2. Input: Connect-ExchangeOnline -UserPrincipalName <administrator email>
  3. Input: set-CASMailbox <Email being enabled/disabled> -OneWinNativeOutlookEnabled <$true> if enabling or <$false> if disabling

To confirm that this was successful

Input: Get-CASMailbox <email being checked> | Select *

Scroll through the list of mail clients and confirm that OneWinNativeOutlookEnabled has the required value next to it

To enable/disable access for your entire organization

  1. Run the PowerShell app as an administrator
  2. Input: Connect-ExchangeOnline -UserPrincipalName <administrator email>
  3. Input: Get-CASMailbox|Set-CASMailbox -OneWinNativeOutlookEnabled <$true> if enabling or <false> if disabling

Message ID: MC376710
Published: 06 May 2022
Updated: 06 May 2022

Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

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