Server says "" for hotmail account

Whenever I load emclient I get the message above. I have tried removing and reinstalling without success. Emclient will not complete a repair. Have removed and replaced the hotmail account, makes no difference. Can anyone please suggest what I try next?

You will need to go to Menu > Accounts, and if the account is setup with IMAP, remove it from eM Client then add it again by clicking on the Add Account button, and entering the email address in the automatic setup.

Thanks Gary. The account was reading as set up on exchange. I saved what I wanted, deleted the account and added it again. It came up as an IMAP and now works properly. No idea what caused it, but there was an MS update the day before it failed. Thanks again for your help - gave me the impetus and confidence to do something.