Hi,
I'm new to this forum, this is my first post, however, I am an experienced computer user and administer a network etc.
The reason I've posted that below, may possibly help those out who have set an encryption password on their iTunes backup, are sure of their backup password, possibly because they've recorded it in a password manager, as I myself have done, and then find that when they need to restore a backup, the encryption password will not work, receiving an error "the password you have entered is incorrect please try again" (or similar).
A few months ago I purchased a new home tower. Whilst I was commissioning it, I used my Dell XPS laptop as my main computer. During this time I had occassion to change my encrypted iTunes password. I did this un the Dell XPS and recorded the new password in my password manager, so I knew that it was correct.
Yesterday, using my new tower which has iTunes installed along with several backups of my iPhone, I attempted to change my encryption password. I tried and tried but received the error message as above. I should also say that I have my iPhone set to complete a cloud backup each day. So to recap, I first backed up my iPhone in iTunes on my tower and then forced an iCloud back up of my iPhone, so my tower Itunes account showed that I had backed up both to the tower and to the cloud, all withing a few minutes of each other.
then attempted to change my encryption password, however I was told that it was incorrect. Having thought about this overnight, I fired up the XPS, plugged my iPhone into iTunes, carried out a local backup on the XPS and then attempted to change my encryption password, and it worked. The XPS recognised my password straight away. I then turned off find my iPhone and requested a restore from the cloud backup which it would have allowed me to do had I not cancelled.
So it appears that the moral of this story is, that to successfully retreive a cloud or local backup and restore it to your device, you must use the computer that you originally set up your encryption password on, or else, you will neither be able to restore a backup or change your encryption password as it appears neither of these, from my experience at least, are backed up when doing a backup on another computer other than the original one (my XPS for example) and when backing up to the Cloud, the encyption password is not retained here either.
I'd be interested as to what answers the Apple techies come back with re this one............something's not right somewhere !!!!!