If you happen to experience connection errors. Please ask your IT personnel to check the below.
Destination is cloud2.thinkcei.com We
We recommend exceptions be made for the hostname rather than the IP address as it may change in the future.
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Try adding these exceptions for outbound filtering for the host cloud2.thinkcei.com:
• TCP/443 - Required for HTTPS access to remote desktop workplace webpage, cloud2.thinkcei.com
• TCP/3389 - Standard RDP port utilized by terminal services to connect to the RDS session hosts / RDS Farm. The primary RDS transport.
• UDP/3391 - Allows the transport to create that connection.