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You may be unable to log on to the server because your keyboard was set to an English layout during Setup
After you choose a language and keyboard layout during Setup, your keyboard can remain in the English layout. Any passwords that are created during Setup might be based on the English keyboard layout. Because of this, you may be unable to log on to the server after Setup is finished. This can occur because the keyboard language format is set to English by default during Setup. If you change the language format, the keystrokes that you use to create the passwords may not map correctly to the keyboard layout that you are using.
To resolve this issue, after finishing Setup, perform the steps in the following procedure to reset the server password.
To reset the server password
1.In the logon screen, click the Language bar, select English, and then log on to the server by using the password that you created during Setup.
2.Open the Windows Storage Server 2008 R2 Essentials Dashboard.
3.On the Computers and Backup page, click Change the server password.
4.Type and confirm a new password for the server, and then click Change password.