Are CALs needed when running 3rd party software on Windows Server?

[David945]

Are user/device CALs required to run 3rd party proprietary applications, such as VOIP or CRM servers that open a TCP Port for clients to connect?

Or do I only need user/device CALs if clients access actual Windows Server Features such as DHCP/DNS/AD?

[#2]

Use of ANY service from a Windows Server requires CALs

Client Access Licenses (CAL) & Management Licenses | Microsoft Volume Licensing

[#3]

@Dave Patrick Even if that service is a 3rd party application?

[#4]

Yes, absolutely. The Cals are for windows server access, not the 3rd party product itself.

[#5]

Just checking if there's any progress or updates?

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