
Take into account the round-trip time (RTT), which is the time it takes data to be sent from a sender to a destination host, plus the time needed to receive the acknowledgment back to the original sender.

If you need to use a wireless connection, make sure that the signal level is strong enough, and the channel is selected correctly and doesn’t interfere with the same channel number of nearby Wi-Fi networks. A wireless network connection can be unstable and have high latency.

Traffic inspection software on routers also has a negative impact on performance. Network congestion reduces Office 365 performance. If traffic shaping is configured, make sure the internet speed for clients is enough to work in Office 365. Outlook Online initiates such connections for proper work. Office 365 establishes a high number of longer-lasting network connections.

You need an internet connection with high bandwidth and low latency. The main requirement for using Office 365 is an internet connection. The reasons can be issues on a client’s computer (hardware and software), network or internet connection issues, and issues on Microsoft’s side (software updates, issues in a datacenter). There are multiple factors that can cause Office 365 slow performance. DISCOVER SOLUTION Why Is Office 365 Running Slow?
