Today between 2pm and 3:20pm we noticed high load on one of our Exchange Server nodes causing the system to not process some requests. This caused a number of users to have some connectivity issues with Outlook. We have since identified a bug in the platform and temporarily remediated the fault and are now watching the systems closely. Tonight we have scheduled further remedial work to prevent the issue from reoccurring. If you have any further questions, please feel free to contact us.