SOLUTION: Windows 8 HTC phone stops Syncing mail with Exchange Active with error 8500201C

Problem:
Windows 8 HTC phone stops Syncing mail with Exchange Active Sync with error 8500201C

Windows 8 HTC 8X phone, Exchange 2007 Mailbox

Symptoms:
Windows 8 Phone was synching fine. But suddenly it stops synching with error 8500201C
Deleted exchange profile on the phone and defined again. Phone started to sync but after some time it stopped again with the same error. Also in exchange console I saw that last sync time is updated. But in CAS server IIS log I only saw first connection attempt from the phone. No any other entry in the IIS log. (folder sync events etc.)

Cause:
Windows phone 8 cannot handle malformed/corrupted mail in the mailbox and stops synching.

Resolution:
When the malformed strange mail is received, Windows Phone 8 phone stopped synching. We noted the time that problem started and searched the mails with received with problem time interval. As soon as malformed mail is deleted, phone began to sync without a problem.

More Information:
I think Windows Phone 8 should tolerate the corrupted mails.

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One Response to SOLUTION: Windows 8 HTC phone stops Syncing mail with Exchange Active with error 8500201C

  1. Geoff says:

    I get this error and its not caused by corrupted emails in the folder.

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