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Do you have 2FA/MFA enabled for your Azure AD domain?
Make sure that the account AD Connect creates in your tenant for the AD Connect sync account is exempt from this.
Azure AD Sync error
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(134.4, 92%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJM%3C/text%3E%3C/svg%3E)
Jeffrey Miller
21
Reputation points
I get an error when I try to install and configure the Azure AD Sinc.
An error occurred executing Configure AAD Sync task: The ADSync service is not allowed to interact with the destop to authenticate.
An error occurred executing Configure AAD Sync task: The ADSync service is not allowed to interact with the destop to authenticate.
Microsoft Security | Microsoft Entra | Other
Answer accepted by question author