Blocking Unauthorized SmartPhone Apps accessing Corporate e-mails using Exchange Web Services
Hi All,

Can anyone please guide me in restricting unauthorized apps available with various smartphones accessing the Corporate Emails using Exchange Web Services? 

The specific Exchange Web Service traffic is not passing through TMG. Hence the restriction cannot be applied on TMG.

We are looking for using EWSBlockList and it works perfectly with a single app (user agent). No luck with multiple apps or user agents. Checked the forum as well as support knowledge base and could not find anything specific powershell command to block multiple apps using EWS blocklist.

Set-CASMailbox -identity "Test App1" -EWSApplicationAccessPolicy:EnforceBlockList -EWSBlockList:"*CloudMagic*","*Aqua*" -EWSAllowOutlook:$True -EWSAllowMacOutlook:$true -EWSAllowEntourage:$true -EWSEnabled:$true

The above command blocks the app - "CloudMagic". However the other app  - "AquaMail" works perfectly.

Appreciate your thoughts and guidance.


April 14th, 2015 5:27am

You're going to need a more elegant mobile device management solution than Exchange offers.
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April 14th, 2015 9:44pm

Pravar, did you ever solve this?  Did you identify any other problematic email mobile apps like CloudMagic and Aqua Mail that use EWS and not ActiveSync?
September 3rd, 2015 4:14pm

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