This KB article offers guidance on resolving an issue where the Mist Cloud Site Configuration fails to apply to the device as intended.

• Inability to push configurations from the Mist Cloud to the SRX, despite the SRX being connected.
• Upon reviewing the logs and the WAN Edge Insights, I discovered that the connection between them was flapping, which explains the configuration push failure.
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• This is a new implementation.

For cases where the Mist cloud Site Configuration fails to apply to the device, especially in new implementations not yet in production, a suggested solution is to perform a re-onboarding of the device into the Mist cloud. In this specific scenario, the customer successfully resolved the issue by first performing a zeroize of the device and then re-onboarding it into the Mist Cloud. Following this procedure ensured that the device was properly synchronized with the Mist Cloud, and the Site Configuration began to apply as expected.

request system zeroize (Junos OS)

[SRX-Mist] Adopt SRX Firewall on Mist