I know this is a really old thread but could really use some help please. Work for the NHS and we currently have around 50 Samsung Galaxy S2 devices using NHS mail. Had no problems/issues on initial set up, started using this smartphone around May 2012 and have been issuing them up until and including this month. Since the beginning of this year, I've been inundated with problems with NHS mail synchronising on the Samsung. They have all been working fine, they haven't changed their password or been locked out, but all of a sudden just stopped synchronising. Tried all the usual, checking battery, signal strength, switch on/off, hard reset. In some cases, going into Exchange Server Settings and re-entering the mail password etc has refreshed it and started syncing again. But in several cases, I've had to delete the email account and try setting up again and have got the following error messages so have then had to perform factory reset of phone and then set up again.
"cannot connect to server"
"this server requires security features that your Android device doesn't support, including: (null)"
"the server responded with an error; please check your username & password and try again" (usually for an incorrect user name or password it would simply say "invalid username or password")
Now most of these have then worked again and not complained since. But one or two, even after all of this, still brought up those error messages. I have then ended up pushing them to one side for a few hours and then when I went back to them, managed to complete the email set up once again.
Yesterday, I got a new error message altogether! A user reported in the afternoon that her phone had not synchronised her email in about 4 hours. Towards the bottom of her screen, it was constantly displaying the small message "
Unable to open connection to server due to security error" She hadn't been locked out, hadn't changed her password and nothing else had happened to explain it. I tried to refresh it by re-entering password in Exchange Server Settings but came up with the following error: "
Setup could not finish. You entered an incorrect server address or the server requires a protocol version that email does not support" This has me completely lost. I did all of the above, deleted the email account and tried again, same message. I then performed a factory reset of the device and tried setting email up again - same error message. Our IT department can't think of any reason to explain it and I can't seem to find anything online. Vodafone have said everything is fine as far as they can see.
Has anyone experienced any of the above issues and does anyone know any reason/solution?
Thanks