I'm a Firewall Administrator and am incharge of multiple locations. In location A, there are 80 users who use Outlook of O365 connecting to a specific domain. Similarly, in location B, there are 500 users also using Outlook of O365 connecting to same specific domain.
The issue am facing is, during the peak hours(1pm to 4 pm), in location A, where there are around 200-300 active users, the Outlook starts disconnecting. The error says - Disconnected, at the bottom right of the screen. When I do Wireshark for the Outlooks autodiscover IP, I get RST flag.
However, in location B, where there are 80 users I dont find any disconnection.
My question is, is there any concept of concurrent Outlook session through an public IP address that at a particular number of 'xyz' the Outlook wont accept new sessions and it will disconnect the user and start throwing error Disconnected. Is there any feature in Outlook that no more than 'xyz' number can connect through an IP address.