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Since your AVD session hosts are already domain-joined, you can configure them for Hybrid Microsoft Entra Join so they register in both your on-premises Active Directory and Entra ID.
I would like to provide you some information to help you with your concerns.
- Prerequisites
Azure AD Connect installed and syncing with your Entra tenant.
Supported OS (Windows 10/11 Enterprise multi-session, or Windows Server 2016+).
Appropriate authentication method (Password Hash Sync, PTA, or AD FS).
- Configure Hybrid Join with Azure AD Connect
1.On your sync server, open Azure AD Connect → Configure
2.Choose Configure device options → Next
3.Select Configure Hybrid Azure AD join → Next
4.On the SCP screen, select your AD forest and authentication service, then provide Enterprise Admin credentials.
5.Choose the OS versions in scope → Next → Configure
This creates the Service Connection Point (SCP) in AD, allowing devices to auto-register with Entra ID.
- Validate Device Registration
Run the following on a session host: dsregcmd /status
Then, confirm AzureAdJoined = YES and DomainJoined = YES.
In the Entra admin center → Devices → All devices, verify that Join Type shows Hybrid Azure AD joined
- AVD Considerations
Use a consistent join type across all hosts in a pool (avoid mixing Hybrid and Azure AD join).
Hybrid join enables features such as Conditional Access and Intune enrollment for session hosts.
Reference: Configure Microsoft Entra hybrid join - Microsoft Entra ID | Microsoft Learn
Wishing you a successful configuration and have a great day!