Forum Discussion

Brass Contributor

Feb 15, 2021

Solved

Block Outlook-Client on unmanaged Win10

Hi All, my customer wants to block the Outlook-Client on unmanaged Win10-Devices (private PCs), but Teams-Client should work. I´ve done some testing with Conditional Access, MCAS and App-Protect...

Conditional Access

Intune

MarkusDi
Feb 21, 2021
now we use Windows Virtual Desktop and block private devices completly.

Thanks for your help.

Best regards,
Markus

NicklasAhlberg

Brass Contributor

Feb 15, 2021

Hello MarkusDi

I recommend that you use a Conditional Access policy and set it up to block non-compliant and non-Hybrid Azure AD joined devices. Please note that you would need an Exchange Online authentication policy to strictly forbid legacy authentication apps to connect. Legacy Authentication does not care for Conditional Access policies. https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/disable-basic-authentication-in-exchange-online

//Nicklas Ahlberg

https://www.nicklasahlberg.se

MarkusDi

Brass Contributor

Feb 15, 2021

Hello NicklasAhlberg

this Policy would block unmanaged devices completly.

But they should be able to use Teams-Client on unmanged devices. "only" the use of outlook-client should be restricted...

Regards,

Markus

NicklasAhlberg
Brass Contributor
Feb 16, 2021
MarkusDi

You could try to just block Exchange Online app but I am sure it will probably interfere with some Teams, OneDrive and SPO functionality. In this case I would use MAM to deploy an MS Edge policy.
- Ajit_kumar_Yadav
  Copper Contributor
  Feb 16, 2021
  NicklasAhlberg yes, it will interfere in OneDrive/SFB and Teams .. I have tested on my environment
  - MarkusDi
    Brass Contributor
    Feb 21, 2021
    now we use Windows Virtual Desktop and block private devices completly.
    
    Thanks for your help.
    
    Best regards,
    Markus