Office 365

[Rhys Daniell]

Hello all!

A usually very reliable application which uses NT 7 has not been receiving emails at a couple of recent installations.

The common feature is that they are both using Office 365.

Sending emails didn't go so well at first but that was resolved by using TLS.

We are trying to receive emails using the standard Office 365 settings:

outlook.office365.com
995
Use SSL

Attempts to receive email just time out, no other errors given.

I think the problem may be to do with their use of TLS. The NT doco says that it tries different TLS settings until one works but perhaps it has to be forced to one of them?

Any help gratefully received.

Rhys

[Bruce]

Hi Rhys,

Which build of NT7 are you on?
You'll need to be on 7.40 in order to use TLS1.1 and 1.2. Before that it only goes up to TLS 1.0.

The other thing about NT7 is that you can set the SSLMethod specifically to NET:SSLMethodTLSv1_2.
The default in NT7 is NET:SSLMethodTLSv1 - ie TLS 1.0, not 1.1 or 1.2.

>> The NT doco says that it tries different TLS settings until one works

The default in NT8 and later is NET:SSLMethodTLS but this isn't available in NT7.

With NET:SSLMethodTLS it attempts to connect on TLS1.2, then 1.1 then 1.0. , but as I say that's only in NT8.45 or later.

Back to Outlook - the most likely issue is that they may have changed the minimal SSLMethod they accept. So try setting the SSLMethod to  NET:SSLMethodTLSv1_2 and see if that helps.

Cheers
Bruce