1. We have an Exchange server 2003, it was installed for local purposes only.
We need to change the exchange server name to a real name, in order to create a PTR record for it. The most important thing is that none of the clients will be affected by this change. Please write on your PMB how will you handle this situation.
2. How long is the exchange server down time?
3. work on this exchange server can be preformed starting Thursday night till Friday afternoon (GMT+2 time zone). ONLY.