Rds Cal License Registry Key May 2026

Understanding RDS CAL License Registry Key: A Comprehensive Guide

1. The Grace Period Key

The grace period is a 120-day window during which an RDS host accepts connections without a valid license server. The registry holds a binary value named GracePeriod (or sometimes MSLicensing in older builds). Deleting or modifying this key can reset the grace period, but this is not recommended in production except as a last resort.

Note: You can also use the Microsoft Learn guide to verify if the server is properly configured via PowerShell as an alternative to registry edits. 3. Clear Cached Grace Period (Troubleshooting) rds cal license registry key

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\TermServLicensing\Parameters

⚠️ Important: Editing the registry can break Remote Desktop Services if done incorrectly. Always back up the registry and the RDS licensing database before making changes. Understanding RDS CAL License Registry Key: A Comprehensive

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\Licensing Core Specified License Server : Defines the server(s) issuing CALs.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM Deleting or modifying this key can reset the

Note: Per‑user CALs are tracked here too, but actual usage is stored in Active Directory or a database file (edb*.log in %SystemRoot%\System32\LServer).