Thank you for addressing @Monalla-MSFT
For more information, please see the metric attached here please
As per these attachement, it is clear that something happened on Feb 7th.
Upon tracing back I could see we had deployed a proxy server on Feb 8th and created an application rule in firewall for this proxy server. But the log says we had issue on Feb 7th mid day.
Not getting a clue on where to check, if this is something to worry about as I dont see any issue with the firewall's functions.
Thank you