You need to check your companys network settings if you're admin or reach out to the admin with error. to resolve:
Check your IT department to check if port 10225 is blocked or if the proxy/firewall settings need adjustment.
Also your company's external IP has to be added to the Redis firewall or/and Vnet rules. Go in > Azure Cache for Redis > Firefall (Settings) and add your machine's public IP (needs to be visible to Azure).
You can do a telnet test on that port from your company network to verify
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Regards,
Abiola