windows 2012 and 17.11 problems

Hi,
I'm running ejabberd on win2012 data centre edition an have 3 differend problems, 2 I could solve by my own.

1:(unsolved)
@ejabberd_s2s_out:process_closed:161 Failed to establish outbound s2s connection domain.com -> conversations.im: Stream closed by peer: This host does not serve conversations.im (host-unknown)
DNS works fine and other s2s_out are not using Stream are working as well e.g.:

@ejabberd_s2s_out:handle_auth_failure:229 (tls|<0.534.0>) Failed outbound s2s EXTERNAL authentication domain.com -> jabber.de (85.214.196.40): Authentication failed: Peer provided no SASL mechanisms
2017-12-02 01:11:51.976 [info] <0.532.0>@mod_s2s_dialback:s2s_out_auth_result:148 (tls|<0.534.0>) Retrying with s2s dialback authentication: domain.com -> jabber.de (85.214.196.40)
2017-12-02 01:11:52.132 [info] <0.362.0>@ejabberd_listener:accept:302 (<0.535.0>) Accepted connection 85.214.196.40:49450 -> IP:5269
2017-12-02 01:11:52.257 [info] <0.536.0>@ejabberd_s2s_in:handle_auth_success:188 (tls|<0.535.0>) Accepted inbound s2s EXTERNAL authentication jabber.de -> domain.com (85.214.196.40)
2017-12-02 01:11:52.320 [info] <0.532.0>@ejabberd_s2s_out:handle_auth_success:218 (tls|<0.534.0>) Accepted outbound s2s dialback authentication domain.com -> jabber.de (85.214.196.40)

2: (solved) C:\Program Files\ejabberd-17.11\lib\fs-2.12.0\priv\inotifywait.exe was not starting but force me to this page as it mentioned correct version of .net seems not to be installed.
https://support.microsoft.com/de-de/help/2715633/shim-errors-for-the--ne...

This could be solved by compiling source files from https://github.com/thekid/inotify-win with command:%WINDIR%\Microsoft.NET\Framework\v4.0.30319\csc.exe /t:exe /out:inotifywait.exe src\*.cs on the target system

3: (solved) for unknown reason I need to set s2s_cafile (used from https://curl.haxx.se/ca/cacert.pem). According to other forum topics this option is required only on CentOS? If not set on my Windows system I'm getting "unable to get local issuer certificate" error on s2s_in for external servers.

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