Our internet connection in the office is running extremely slow, preventing users from accessing their emails.
Yesterday I contacted our ISP. They restarted the line and said everything fine. The router says the connection is at 6-7Mb which is normal.
But using the internet is unbelievably slow. Click a link and then go and make a cup of tea slow.
The suspicion is that there is some malware in exchange.
I ran a scan on the router using malwarebytes, attempting to apply the correct file exclusions. It didn't find anything.
Looking at the NAT sessions table on the router it shows a large number of active sessions involving ports 25 and 443, but I don't know what is normal.
If I reboot the router, there is flurry of emails arriving from Exchange, then it quickly grinds to a halt.
I'm a bit desparate. But fortunately I'm not called Dan