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This article can help you troubleshoot these Office 365 upgrade issues:
Immediately after the upgrade, here are the URLs that you can use:
Note that https://www.outlook.com/ can no longer be used to access email, SkyDrive, or Messenger.
First, make sure you are navigating to the correct URLs and signing in with your user name and Office 365 password. Here are the URLs that you can use:
If you see one of the following error messages, your browser may be caching your sign-in credentials:
Try one of the following:
If these don't work for you, or the problem persists for more than a few hours, contact your administrator for help.
Immediately after the upgrade, users may not be able to access Exchange Control Panel (ECP) and some features in ECP, such as Connected Accounts, may be unavailable to administrators. This issue should resolve automatically within a few days.
You can perform the steps for them if you are a local administrator on the user's computer. Follow Set up your desktop for Office 365 or Manually update and configure desktops for Office 365 to update and configure your user’s desktop computer.
Even if the user does not complete these steps, the user can use a browser to connect to Outlook Web App to read and send email.
If your users have trouble connecting to Office 365 with their mobile devices or want to set up email on their mobile devices for the first time, see Use email on your mobile phone.
Microsoft accounts become personal accounts after the upgrade, so as an administrator, you cannot administer or close these accounts yourself. Contact Hotmail, Messenger, and Skydrive support to report the abuse.
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