GPO "Block Signing into Office" does not working anymore

Question

Hello,

we have our own on-premise exchange infrastructure and need to prevent using o365 accounts in Office / Outlook 2016.

Therefore we have configured the follow GPO "Block Signing into Office" with "None allowed". That had worked for the last times.

Since view weeks, it does not works anymore and every user can add a third-party O365 account to our Office suite.
The GPO are applied and the reg value are correct.

Are there any known changes by MS in Windows, Office or GPOs that have changed the behavior?
What can I do, to block the O365 cloud features on my devices?

We are running Windows 10 Enterprise v1809 and Office 2016.

Answer 1

How it can be a problem of Office 365, when it does not used by our organization.

I want to prevent, that our users can connect to O365 services with Outlook or Word/Excel.
From my understanding, it doesn't have to do with o365 services and is located on the system / ad on premise.

Answer 2

Hi，

For questions about o365, please refer to the link below

https://techcommunity.microsoft.com/t5/office-365/bd-p/Office365General

Hope this information can help you

Best wishes

Vicky

Answer 3

Hi,
Just checking in to see if the information provided was helpful.
Please let us know if you would like further assistance.
Best Regards,
Vicky

Answer 4

Hi,
Welcome to share your current situation if there are any updates.
Please feel free to let us know if you need further assistance.
Best Regards,
Vicky

Answer 5

Unfortunately I got no responses on my questions. The Problem is still open and not solved.

https://techcommunity.microsoft.com/t5/office-365/gpo-quot-block-signing-into-office-quot-does-not-working-anymore/m-p/2444018/highlight/false#M35037