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ActiveSync not working with Exchange 2013

Hello All,

 

I know there are several posts on this topic in the forums & knowledge base sections, but none of those posts have help solve my issue.

 

We recently migrated from Exchange 2010 to 2013, in preparation for our hybrid Office 365 migration.

After recreating our UTM WAFs following these guides:

https://sophserv.sophos.com/repo_kb/120454/file/Exchange%20WAF%20Guide%20-%20UTM%209.3%20-%20Nov%202015.pdf

https://networkguy.de/secure-exchange-webservices-with-sophos-utm-waf/

 

We are unable to connect to Outlook Mobile App.  All other Exchange/Outlook services work fine.  When attempting to connect Outlook Mobile App, I receive an "Account Blocked" message.

Log files show:

- url hardneing error: No signature found, URI: https://domain.com/Microsofr-Server-ActiveSync User=jsmith Type=Outlook

 

Other solutions I've tried that did not work:

- Adding/Removing "Skip Filter Rules"

- Tried all Reverse Authentications for ActiveSync.  Currently set to "none".

- Removing /microsoft-server-activesync URL from the Firewall Profiles & Exceptions Static URL Hardening list.

 

Currently, we have a DNAT workaround in-place to allow all https traffic through.

Before our migration to Exchange 2013, all Exchange/Outlook services worked fine.

 

Any help would be appreciated.

Thanks!

Todd



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  • Hi Todd and welcome to the UTM Community!

    This is just a WAG - do you have an Exception where 'Never change HTML during Static URL Hardening or Form Hardening' is selected for his traffic?

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • Hi BAlfson,

    Yes, I have an Exception where "Never change HTML" is checked.

    For this Exception we have Static URL hardening checked and /microsoft-server-activesync added as a Path.

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