Hi I have a problem with a Small Business Server 2003. All was working fine until a reboot after replacing a faulty tape drive. After the reboot users could not connect to the server - they were getting the DHCP settings OK but could not access any shared drives or Exchange on the server. After re-running the 'Internet and Email setup wizard' on the server (but not changing any settings) the clients could see the server again.
Now we have periodic drop outs where the client loses connection to the server or where accessing the shared drives takes minutes. Checking all error logs I can not see anything that looks wrong.
The only recent change to the server has been a patch added to Pastel accounting software (by a 3rd party) and a new tape drive installed (but not software changes with the tape drive as it was a straight replacement).
I've been through everything I can think of so any ideas would be a great help. All clients are Windows XP Pro.