On your phone, in the App list, tap Settings and then tap email + accounts . Tap add an account

Office 365

On your phone, in the App list, tap Settings and then tap email + accounts.
Tap add an account > Outlook.
In Email address, enter your Email address.
Enter your password, and then tap sign-in.
If your subscription includes Lync 2010, and you don't have the Lync 2010 application on your phone, the confirmation page will ask you if you want to install it. Clear the check box if you don't want to install Lync 2010.
Click Finish.
Press OK if Exchange ActiveSync asks you to enforce policies or set a password.

Learn more
Lync Send instant messages and make calls.

On your phone, go to Marketplace, and search for Microsoft Lync 2010.
Tap Install. As soon as the app is installed, it appears on your phone.

Sign in to Lync
Start the Lync 2010 app, and on the sign-in screen, enter your Office 365 user ID and password, and then tap the check mark. Tap More Details to enter your server information.
Access your documents and sites On your phone, in the App list, tap Office.
In Office, swipe to the Locations pane.
Tap the plus sign (+).
On the Open URL page, type the address of the SharePoint server or team site, and then tap the arrow.
Tip Your team site address for the domain you got with Office 365 looks like
http://[YourDomain].sharepoint.com
Your team site address for a custom domain looks like http://[YourDomain].com On the Office 365 sign-in page, sign in with your Office 365 user ID and password.

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