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://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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