I just moved our Exchange 5.5 SP4 on NT4 SP6a to Exchange 5.5 SP4 on Win2k SP3. All is fine with all my Windows Outlook clients. But my Mac person cannot access now through Outlook. I cannot see difference for her through the server or on her Mac. Any ideas? It says it cannot find the Exchange server, that there are network problems. She can browse on the Internet. She can even access her mail via OWA. Any ideas?