Changing the server name will not affect messages in the mailbox.
To do so in the past, you'd have to use a tool such as Trillian.
If you experience such errors as Server Error 3219 and Windows Live Mail Error ID 0x8DE00005, then read on for your solution.
Click on the cogwheel 2.
At this time, WhatsApp Web is available only for Android, iPhone 8.
You can chat with someone online, pick up the phone and call or visit your local Microsoft store for help.