I can't log in to my hotmail account with my ipad 2 or iphone 4s, anyone knows how to fix it? Since i changed my password it won't lig in...

iOS: Unable to send or receive email

http://support.apple.com/kb/TS3899

Can’t Send Emails on iPad – Troubleshooting Steps

http://ipadhelp.com/ipad-help/ipad-cant-send-emails-troubleshooting-steps/

Setting up and troubleshooting Mail

http://www.apple.com/support/ipad/assistant/mail/

Setting Up An eMail Account

http://support.apple.com/kb/ht4810

iPad Mail

http://www.apple.com/support/ipad/mail/

Try this first - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.)

Or this - Delete the account in Mail and then set it up again. Settings->Mail, Contacts, Calendars -> Accounts Tap on the Account, then on the red button that says Remove Account.

 Cheers, Tom 😉

The steps for generating a new app password are always the same:

Sign in to your Microsoft account.

Under Password and security info, tap or click Edit security info.

If you're prompted for a security code here, enter it and tap or click Submit.

Under App passwords, tap or click Create a new app password.

A new app password is generated and appears on your screen.

The way you enter an app password can be slightly different, however, depending on the app or device you're trying to sign in to. Several of the most common ones are listed here. Tap or click the ones that apply to you.