Hi All We have taken over a site. Server NT4 and Exchange 5.5. The server is not set to daylight saving nor or the client computers. When sending and receiving external emails they appear to be an hour out. Chnaging to daylight saving corrects the email time but changes all the appointments in the calendars by an hour. They have around 20 shared calendars with appointments booked in for the next 12 months. Any suggestions? Many thanks for your help. Frustrated Admin