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Windows Phone 7 error code 86000C0A

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Hi all, Around 18 hours ago, my Windows Phone 7 (7.5) stopped syncing with my Office 365 account (plan P1) with an error code of 86000C0A. Additionally, ExRCA is showing everything is fine until "Attempting the FolderSync command on the Exchange ActiveSync session.", where it displays "A Web exception occurred because an HTTP 503 - ServiceUnavailable response was received from Unknown." Everything seems to be fine through OWA and Outlook, and the phone is receiving email fine from other exchange accounts. Any thoughts?
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