thanks for the fast reply kent.
attached is a screenshot of the error message. i have followed every instruction to the letter (as i have successfully set up outlook 2010 to sync on one computer already using the following instructions.....
Method 3: Manually set up Outlook
Note This method is not a permanent solution because the location of your mailbox may change. Exchange Autodiscover is the supported permanent solution. If you use these steps and your mailbox server location is changed, you'll have to repeat these steps.
Manually set up Outlook to connect to Exchange Online in Office 365. To do this, follow these steps:
Determine the mailbox server name and the proxy server URL. To do this, follow these steps:
Sign in to the Office 365 portal (portal.microsoftonline.com).
Click Outlook to open Microsoft Outlook Web App.
In the upper-right corner of the page, click the Help icon (the question mark), and then click About.
On the About page, note the Host address.
Manually set up Outlook to connect to Exchange Online. To do this, follow these steps:
Click Start, click Control Panel, and then click Mail.
Click Show Profiles and then click Add.
Type a name for the profile, and then click OK.
Click to select the Manually configure server settings or additional server types check box, and then click Next.
Click Microsoft Exchange, and then click Next.
In the Server box, type the host address that you noted in step 1D. * I typed CT45******.mailbox.outlook.com
Note This name should be the first 10 characters of the host address together with "mailbox.outlook.com" (without the quotation marks). For example, if the host address is "SN2PRD0502.outlook.com/owa," use "SN2PRD0502” together with ".mailbox.outlook.com". In this example, enter "SN2PRD0502.mailbox.outlook.com" (without the quotation marks).
Make sure that the Use Cached Exchange Mode option is selected.
In the User Name box, type your user name (for example, alias@contoso.com), and then click More Settings.
Click the Connection tab.
Make sure that the Connect to Microsoft Exchange using HTTP check box is selected, and then click Exchange Proxy Settings.
In the Use this URL to connect to my proxy server for Exchange box, type the host address that you noted in step 1D. * I typed CT45******.outlook.com
Note Enter the host address without the "/owa". For example, if the host address is "SN2PRD0502.outlook.com/owa", enter "SN2PRD0502.outlook.com" (without the quotation marks).
Make sure that the Only connect to proxy servers that have this principal name in their certificate check box is selected, and then type msstd:outlook.com. i typed msstd:outlook.com
Click to select the On fast networks, connect using HTTP first, then connect using TCP/IP check box, and then click to select the On slow networks, connect using HTTP first, then connect using TCP/IP check box.
Under Proxy authentication settings, click Basic Authentication.
Click OK two times.
Click Check Names. When the server name and the user name are displayed with an underline, click Next.
Click Finish.
thanks
paul
successfully set