Publishing IMAP/IMAPS on Microsoft UAG 2010 – UAG Support Boundary

Posted by Ahmed Nabil In | 0 comments»
Recently several users with BlackBerry phones approached me seeking to access their corporate email on their phones. Microsoft UAG doesn’t support Blackberry service however a workaround to this is using the IMAP to access and download their emails on their Blackberry phones.

Microsoft Highly recommend and Advice all UAG administrators to leave the TMG configuration (Installed by default on the UAG box) untouched. The TMG rules and configuration is controlled and configured by the UAG. The administrators should not use the TMG for publishing applications and other stuff. However there are some exceptions to this strict recommendation and its published in the UAG support Boundaries document. I also checked with Microsoft Support team and they confirmed the IMAP publishing based on this document.


As per the above mentioned document, Forefront TMG can be used to publish IMAP/IMAPS. Attached below is the section dealing with supported configuration on the TMG as per the above document.

TMG supported configuration on UAG

Accordingly IMAP/IMAPS can be published normally from the TMG server (On UAG Box). This will be a simple Server Publishing Rule with the following settings:

  1. Action - Allow
  2. Traffic - IMAPS Server
  3. From - Anywhere
  4. To - Type You Exchange Server IP
  5. Networks - External or DMZ (As per your setting)
  6. Schedule  - Always
Its Highly recommended to use the IMAPS over the IMAP to ensure the traffic is encrypted.

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