Hi @Ernani Ancheta,
Yes, even though we have specified the update source, the client can still search/look for updates through Microsoft/Internet. We can stop it by deploying the GPO Do not connect to any Windows Update Internet locations.
The link for your reference:
Do not connect to any Windows Update Internet locations (thewindowsclub.com)
Note: Microsoft provides third-party contact information to help you understand the problem. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
Looking forward to your feedback.
Best regards
Cherry
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