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Push Notifications for Secure Mail with iOS 14 not working

Marc Kuhn


Hi guys

we have a new environment with Citrix XenMobile 10.13 On-Prem and Exchange 2016 also On-Prem. I had another topic here with the same issue in another environment. I have done the following thing here:

1. Firewall Rule configured from XenMobile to Apple: 


2. Fireall Rules configured from Netscaler & Exchange to Citrix Listeners:




3. Secure Mail Config:





Everything is working except the Push Notification. Also i noticed when i try to browse the XenMobile Server MDM URL from the Internet, i receive this error:




I'm not sure if those two things are related but with my other customers XenMobile i don't get this Error.


Many thanks for any hints on that.


Best regards,



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i just realized the i was able to telnet the URL, but not both of those IP's from the Exchange. There was a typo in the Firewall Rule Config. Now i receive this message on the Exchange:


The request was aborted: Could not create SSL/TLS secure channel. Status: SecureChannelFailure    at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at Microsoft.Exchange.Services.Core.NotificationServiceClient.HandleResponse(IAsyncResult responseAsyncResult)


This is configured on Exchange Side:




Best regards,


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