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I understand that you received the error message when you sync your Office 365 account to your Windows Phone7(7.5). However it worked well in OWA and Outlook desktop client.
I’d like you can do the steps below to narrow down this issue:
1. Try to remove this account from your Windows Phone and then re-add this account to see if the same issue occurs.
You can refer to the following article: http://help.outlook.com/en-us/140/Dd936215.aspx
2. Add this account to other mobile phones to see if it synchronize the data well.
You can also refer to the similar thread for a reference:
3. Try to add your Office 365 account in other network, such as WiFi.
In addition, since you have tested your email address in ExRCA, please post the whole content of the test result in the private message so that we can do further research.
For private messages, you can do the next steps:
.Go to the Your details section on the right side of the community site.
.Click Private messages.
.Click the subject title of the response to read the message.
.You can reply by using the form in this display.
.Click Submit Reply.
I completed step 1, but the problem persists.
I attempted to connect to O365 via an iPhone, with no success.
I tried to connect via WiFi, with no success.
I have additionally pasted the results of the ExRCA-Exchange Activesync test in a private message.
1. You can update the exchange server setting on your device to m.outlook.com when you connect your Office 365 account to your mobile phone by referring to : http://blogs.technet.com/b/exchange/archive/2012/02/07/cross-site-redirection-exchange-activesync-clients-in-office-365.aspx
2. Please make sure you have selected the Server requires encrypted (SSL) connection box when you set up Exchange ActiveSync on Windows Phone I provided in the last post.
I am receiving the same error with the server changed to m.outlook.com with SSL Required selected.
I’d like you can refer to the following article to troubleshoot the issue:
How to troubleshooting Exchange ActiveSync in Exchange Online for Office 365. The end users or administrators can use the approaches which were suggested in two Videos from: http://community.office365.com/en-us/b/office_365_technical_blog/archive/2012/01/17/video-troubleshooting-exchange-activesync-in-exchange-online-for-office-365.aspx.
In addition, I’d like to suggest you clean the nicknames cache:
Login to OWA->Options ->See All Options ->Settings -> General -> Check "Use the blind and low vision experience" ->Save ->Sign Out
Sign In (now in OWA Lite)->Options -> Messaging -> E-Mail Name Resolution -> Click the link "Clear Most Recent Recipients list..."
Switch OWA back to Rich Content mode:
Sign In->Options -> Accessibility -> Uncheck "Use the blind and low vision experience" ->Save ->Sign Out
After following the video, and clean the nicknames cache, the problem persists.
Under the Admin portal>Outlook Settings>Phone and Voice>and selecting Exchange ActiveSync Settings to "Quarantine", my previous copies of Windows Mail appeared, but my phone will not, even when I erase the account on the phone and attempt to add it.
Additionally, under Outlook Settings (Manage My Organization)>my account>Details>Phone & Voice Features>Edit, both my Windows phone and my HP touchpad show a last sync time of 11/5/2012 at 4:54 a.m. So something seems to have gone wrong at that time.
I managed to fix my problem by creating a second user, then using that user to delete the first (after backing up email and calendar items), and then recreating the first user. The phone properly syncs now.
I’m very glad that the issue has been resolved, your time and efforts is appreciated. If you have any other questions, please feel free to post a new thread in the forum.