Intrusion Prevention Blocked Office 365 Attachments

Question

Hi, 
 
 We have had our new XG310 in for about a week now, it has mostly been going ok. 
 Just today though, outgoing attachments from Outlook all of a sudden stopped sending. (Stayed in Outbox) 
 I found that all of sudden, IPS was blocking traffic to Office 365. 
 I removed IPS from the firewall rule and that fixed it... but obviously not ideal. 
 
 See screenshots, any idea why this might have happened? 
 We had a similar scenario with our VoIP system, IPS just decided one day that the traffic was no good and blocked it!

Thanks, 
 Matt

Ignatios Papadopoulos · Accepted Answer

As I am informed through the ticket, updating to the latest IPS patterns the issue resolves. 
 Confirmed, the signature no more exists to the IPS signatures.

Aditya Patel · Answer

Hi All, 
 We are currently investigating the issue on our end to verify if it's indeed a False-Positive or a Vulnerability, thank you for your patience.