This is difficult to answer completely without performing a thorough analysis of what resources are being used. You need to monitor and measure disk, CPU, memory and network usage to see if you have any bottlenecks present. In addition, because you indicated that your LAN and WAN connections are slow, you should also investigate what is happening on the network to see what is consuming the bandwidth.
Dig Deeper on Legacy Microsoft Exchange Servers
Related Q&A from SearchExchange Staff
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.