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Active sync error in app log after certificates update

I have been having a  few issues with certificates on exchange 2010, after fixing 2 of the errors I was seeing to do with the domain. I started seeing this message in the App event log. randomly.

EVENT ID: 1100

Exchange ActiveSync device requests for your users are being blocked. This problem frequently occurs when the HTTP OPTIONS method request isn't allowed by the firewall. Please check the firewall that filters requests in front of your Client Access server and the Microsoft-Server-ActiveSync virtual directory.

I have checked with my users and Android / I-phones are working fine, Nothing has changed on the firewall,

I ran a small app i have called ActiveSyncTester and it passed everything both in and out of lan except  the one below:

----------------------------------
ActiveSync:
      Checking for application ................. FAIL
----------------------------------

Yet as I mentioned, everyone is working fine???

any idea?
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BMI-IT
Asked:
BMI-IT
1 Solution
 
e_aravindCommented:
IMO, when the device is communicating to the exchange server
There would\should be a lots of connections happening to the server

out of the good number of connections\requests...some may fail.

> this may\maynot come to the notice of the mobile-device users


Logs:
If possible we can collect\configure the device logs for few users where the app. logs are complaining
Then we can see\observe at what command, at what email\calendar the error is happening

Setting up Verbose Logging in Windows Mobile and Parsing Logs
http://blogs.technet.com/b/vik/archive/2008/12/04/setting-up-verbose-logging-in-windows-mobile-and-parsing-logs.aspx
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BMI-ITAuthor Commented:
That makes sense to be honest, However I haven't seen any more of these errors since around 1pm yesterday, Ill set the logging up and let it run for a few hours anyway.
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