EAS Problems with Windows 7 Clients on Office 2013 or 2016

SmarterMail Enterprise Edition, Version 15.7.6542

Windows 10 running Office 2013 or Office 2016 work without any issues.

Windows 7, 8 running Office 2013 or 2016 all stopped working.

"Log onto Exchange ActiveSync mail server (EAS): The server cannot be found."

Using Fiddler I was able to see the session:

HTTP: Tunnel to mail.domain.com:443

HTTP: Tunnel to domain.com:443

HTTP: Tunnel to autodiscover.domain.com:443

HTTP: autodiscover.domain.com /autodiscover/autodiscover.xml

Then it fails with "Log onto Exchange ActiveSync mail server (EAS): The server cannot be found."

When I test Windows 10 it works, when I test older OS, it fails.

Anyone encounter this?

Mark K. Replied

12/6/2017 at 10:36 AM

Disabling weak ciphers (TLS 1.0) on the mail server broke old windows clients trying to connect to EAS.

I re-enabled TLS 1.0 on the mail server and it seemed to fix the immediate problem for end-users.

Scarab Replied

12/6/2017 at 12:35 PM

Sounds like the same problem with recent versions of MSSQL on Windows Server 2012R2 still defaulting to TLS 1.0 even when the application and OS both can utilize TLS 1.1 & 1.2. We tried every patch and registry hack Microsoft gave us and still had to throw our hands up in frustration and re-enable TLS 1.0 to resolve it.

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