The backend has two connection and looks as if the internet connection is not disabled then ActiveSync still works, if the internet connection is disabled then it stops working. ARR server is step up to only use TLS 1.1, TLS 1.2, backend is setup to use TLS 1.0 and SSL 3.0 which is the limit of 2008. Please note ARR server is Windows 2012 R2 back end is 2008. I have remove compressing and increas e buffer size. This could have occurred as a result of a network error or because of a problem with the certificate installation. The certificate couldn't be validated because SSL negotiation wasn't successful. The Microsoft Connectivity Analyzer wasn't able to obtain the remote SSL certificate.
Obtain the SSL certificate from remote server on port 443. The Microsoft Connectivity Analyzer is attempting to If I try and test from Microsoft Activesync tester I can SSL handshake aborted SSL=0x7970dac0, I/O error during system call. It looks to be a certificate problem but the certificate works for OWA. No matter what I try I cannot get it to work. All of these protocols support Modern authentication. Outlook for Windows uses MAPI over HTTP, EWS, and OAB to access mail, set free/busy and out of office, and download the Offline Address Book.
The problem I am having is with Activesync. Outlook Anywhere (formerly known as RPC over HTTP) has been deprecated in Exchange Online in favor of MAPI over HTTP. The Internal Websites is working fine and Exchange OWA is working without a problem. I have just setup a new ARR server for two websites, internal and exchange.
Hope someone can help me with this, its driving me crazy.
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