SOLVED: How to Manually Configure Outlook 2007 2010 2013 For Office 365

After your have download and run the “Office Desktop Apps” update from portal.microsoftonline.com/download/default.aspx and

1. Obtain the required info from OWA:
   1. Log into OWA, in the upper-right corner, click the question mark (Help) icon and the click About.
   2. Locate and note the Exchange Client Access Server Name, Mailbox Server Name, and Host name.
      
2. Create a new Outlook profile and choose Manually configure server settings or additional server types.
3. Select Exchange and when prompted for the Exchange server you need to do a little detective work. Compare the values you noted above for Exchange Client Access Server Name and Mailbox Server Name. You should find that they both start with the same value.
   

   Outlook OWA Office365 About Screen

   1. In my case they were Exchange Client Access server name: SN2PRD0510CA018.namprd05.prod.outlook.com and SN2PRD0510MB382.namprd05.prod.outlook.com respectively.
   2. What you need is the part at the start that matches – in this case SN2PRD0510.
4. Now, enter this value for the Exchange server and append .mailbox.outlook.com. Therefore, in my case the Exchange server was
   SN2PRD0510.mailbox.outlook.com
5. You can enter the user name as the user’s display name, i.e. John Doe.
6. Click More Settings. You’ll likely get a warning that Exchange is unavailable. That’s ok. Click OK.
7. You may get another dialog prompting for the exchange server again, just click cancel and the extra settings window should appear.
8. Click the Connection tab.
9. Make sure that the Connect to Microsoft Exchange using HTTP check box is selected, and then click Exchange Proxy Settings.
10. In the Use this URL to connect to my proxy server for Exchangebox, type the server name you worked out in step 3 and append .outlook.com. Therefore, in my case, the URL was
    SN2PRD0510.outlook.com 
    1. note that this is the same as the Exchange Server setting but with the word mailbox removed
11. 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
12. 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.
13. Under Proxy authentication settings, select Basic Authentication.
14. Click OK two times.
15. Click Check Names. Enter the user’s Office 365 address and password. When the server name and the user name are displayed with an underline, click Next.
16. Click Finish.

If you have more questions, you might find http://community.office365.com/en-us/f/160/p/10651/49184.aspx useful.