Error Message: HTTP 400 Bad Request - Powered by Kayako SupportSuite Helpdesk Software

08 Sep 2010

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	Error Message: HTTP 400 Bad Request

Article Behavior

An error dialog is shown referencing an HTTPException referring to HTTP 400 when you manually issue a Sync cycle.
- or -
The event log or error log shows HTTPException errors referencing HTTP 400.

Possible Causes / Solutions

1. If you are using Kerio Mail Server version prior to version 6.7 you must configure your server to allow “unsupported devices”. If you do not do this, KMS will prevent NotifySync from synchronizing via EAS. This is configured by modifying a configuration file on the Kerio server. See Kerio’s knowledge base article for more details.

http://support.kerio.com/kb/500

2. If you are using Kerio Mail Server and you have a very large number of email messages within one folder or a very large number of PIM items (in the thousands or ten thousands) is it possible that the volume of items is preventing the server from sending the items to the device. In this scenario some sort of error is occurring with the server which results in the server responding to sync requests with HTTP 400. This applies regardless of the sync range you are trying to use in NotifySync.

You should make sure that you are using the latest version of Kerio Mail Server and also try to reduce the number of email or PIM items within a single folder by erasing old data or archiving.

3. If you are using Microsoft Exchange 2003 it is possible that your server does not supported the minimum required Exchange ActiveSync protocol version required by NotifySync (version 2.5).

Make sure that all available updates and patches have been applied to the Exchange 2003 server.

Article Details

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Created On:

06 May 2009 20:51