ipad email app requests password

Try "Mail troubleshooting" from the following page:

< http://www.apple.com/uk/support/ipad/mail/ >

And see if the solution mentioned at the following page helps:

< https://discussions.apple.com/thread/2439839?threadID=2439839 >

What app are you using for mail? I am assuming it is the built-in email settings your talking about? Have you tried doing a soft reset on the iPad? Press and hold power+home button for 30 seconds, then press the home button again. See if your email continues to prompt you for a password.

Another thing i would suggest is delete the email profile and re-create it. Is this happening for all users or just 1?

Will.

Check with your network admins and make sure the AD account is not currently locked out.

i use the the built-in email app and a soft reset or recreating the accout didnt help.
The account isnt locked out cause if i go into settings an type in the credentials it works.

what is the version of the iOS? iOS 7?

The iOS Version ist 6.1.3

do you have a proper valid SSL certificate assigned to the email server, for mobile and OWA use??

looks like your creds are either not being saved or you have an issue with your email server and or AD DC - perhaps even certificate related, more so if its a self-signed one.

This link will allow you to test your ActiveSync connection on your exchange front end server -- https://testconnectivity.microsoft.com/ using the same info used to create your Exchange account on your iPad.

the cert is not selfsigned and the activesync test says its everything ok.

This issue could be related to IP and SSL.

If your connection is forced on the phone by your administrator to use SSL it will work as long as you don't change your IP address... Swapping from WIFI to carrier LTE/4G, etc... will make the connection invalid for Exchange.

Before when there was no need for the authentication on previous version of Exchange this was not an issue.  

Now to solve it, check your settings and to connect to your server without using the SSL option.

I'm checking right now to see if iOS7 has something that might cause conflicts even if not using the SSL port.

also make sure your passwords match your password policy, once of our users had a shorter password, but because theirs was an older account whose pwd did not expire -- iOS 7 didn't like it, once we changed the pwd to match the current pwd policy, iOS 7 stopped complaining.