I have successfully installed office 2011 on Macbook pro which had been located in my office. There was nothing wrong during the installation and all went fine as I assumed. After that I tried to set up an account in Outlook for connecting company’s exchange server. I did it successfully inside the company firewall. Then made an automatic configuration and the connection is granted. Now from Exchange server I can create or compose a new email or message and also able to verify the receiver name to authenticate. But the issue is it is still not displaying the new account in the inbox section of the left navigation pane. Whenever I try to or attempt to send a new message it is showing me an error which seems to be like this "unexpected error occurs"-17997. I looked into my colleague’s computer and everything is fine and also working properly in their computers. Then, why this error in my Mac pro? Please help with this issue.