Ms exchange activesync problem when switching networks

i've noticed that when i switch networks (i.e. go from ny to sf), i land and set my phone from airplane mode to active, my iphone does not sync with my company's exchange server. it gives me a connection error. i then have to do a reset of the phone and it works fine.
this also occurs when i switch from 3G to edge and vice versa. i have to do a hard reset of the phone in order to get mail to work again. this doesn't occur with my gmail account, just my MS Exchange activesync.
anyone else notice this?

by the way, i'm running 2.0.1 firmware and this was not a problem with 2.0 firmware.

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Elapsed Time: 793 ms.
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MicrosoftOfficeWebServer: 5.0_Pub
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Public: OPTIONS, POST
Allow: OPTIONS
MS-Server-ActiveSync: 6.5.7638.1
MS-ASProtocolVersions: 1.0,2.0,2.1,2.5
Content-Length: 0
Date: Fri, 30 May 2014 08:49:48 GMT
Server: Microsoft-IIS/6.0
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Attempting the FolderSync command on the Exchange ActiveSync session.
The test of the FolderSync command failed.
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An HTTP 403 forbidden response was received. The response appears to have come from Unknown. Body of the response: <body><h2>HTTP/1.1 403 Forbidden</h2></body>
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MicrosoftOfficeWebServer: 5.0_Pub
Pragma: no-cache
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Neither of the Exchange servers is publicly listed as the mail handler for this domain. Mail is preprocessed by a cloud spam filtering service before coming down. So I expect no changes in MX records -- not even a change in the spam filter's delivery IP
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I was also warned about the lengthy conversion requirements for the public folders. I transferred those last weekend. The whole process was over with in less than four hours. Go figure ...
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The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc. The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
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Hi,
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javax.xml.transform.TransformerConfigurationException: javax.xml.transform.TransformerException: java.lang.NullPointerException
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     Anyone got any ideas??

I took a look in the release notes for the version of JAXP that I had previously downloaded and used with JDK 1.3:
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Hey dumpeal2,
Welcome to the forums.
Try following the instructions here to backup and do a clean reload of your device software. http://bbry.lv/cKy9A0 if you get the same result then I would suggest contacting your service provider and have them escalate your issue to RIM.
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I recently updated my phone's SW to Symbian Belle and have the following problem.
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Ms exchange activesync problem when switching networks

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