Hello @KlausBierschenk,
Thank you for posting your query on Microsoft Q&A.
Based on your description, you have cloud sync running both from Entra to AD (Group write back) and from AD to Entra, which has been working fine for the past few months with the new agent version 1.1.1586. However, after you checked the local Agent boxes yesterday, you observed issues with all the agents. In the Azure Portal Provisioning logs, the agents are showing "Provisioning Quarantine" with the error code "HybridSynchronizationTimeoutError."
This issue can occur if the agents are not active, not reachable, or busy. To address this, please ensure the agent is running and active. Check the network configuration (firewall and proxy) and performance (CPU, memory, and disk) of the on-premises server.
Regarding your question about known issues with the new agent version 1.1.1586, I have checked internally and can confirm that no such incidents have been reported recently.
To investigate the issue further, please consider the following steps:
- Check when the issue started and if any changes were made to the network configuration or environment around that time.
- Verify that the network configuration hasn't changed and that the necessary ports are open for the agents to communicate with Azure.
- Ensure that DNS resolution is working correctly for the Azure endpoints.
Verify the required open ports
I hope this information is helpful. Please feel free to reach out if you have any further questions.
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.
Thanks,
Raja Pothuraju.