Office activation - Error code CAAC0003

DaveL 1 Reputation point
2020-10-21T02:59:20.917+00:00

I recently migrated a client from Office 365 commercial to GCC High. All users are now getting the following message when attempting to activate/sign in to Office on their desktops.

Something went wrong. We couldn't sign you in.
Error code: CAAC0003
Server message: Microsoft Azure Government tenant ..... is blocked in Public Cloud.

Selecting Continue seems to push through and activate the product anyways, but why are we getting these messages?

Thanks!

Dave L.

Office Management
Office Management
Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis.Management: The act or process of organizing, handling, directing or controlling something.
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  1. T. Kujala 8,706 Reputation points
    2020-10-21T04:49:21.437+00:00

    Hi anonymous userLab8,

    Have you tried to change the network profile from private to public?

    https://answers.microsoft.com/en-us/msoffice/forum/all/cant-activate-office365-we-are-unable-to-connect/0a2b4485-5b58-4a33-98c7-e75203a3a8bf

  2. Emily Hua-MSFT 27,546 Reputation points
    2020-10-21T08:31:08.23+00:00

    anonymous userLab8 ,
    Please refer to TKujala's reply to have a check.

    In addition, according to the "Server message: Microsoft Azure Government tenant ..... is blocked in Public Cloud.", it seems to be related to Azure AD.
    Starting May 5th 2020, users sign into apps hosted in US Government tenants using the public endpoint (microsoftonline.com), this behavior would be blocked.

    Please check whether the link "Azure Government endpoints are changing" is helpful.
    More questions about Azure AD, please add the related tag on your threads.

    If an Answer is helpful, please click "Accept Answer" and upvote it.
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