We have been a non-profit using GroupWise and Netware for more than a decade. The two Netware servers have been playing nice to the four Windows servers, but now we must decide if we keep GroupWise and move into SLES or we move to Exchange. My IT dept of two wants to keep GroupWise and dive into SLES while our consultants keep saying drop it and move to Exchange because GroupWise is on death row and SLES is wonderful until it breaks and then is hard to get help. If you have been in the same cross road and kept GroupWise, how difficult is the administration of SLES and does it play nice with Windows servers?

Your expertise will be greatly appreciated!