Users are experiencing AVD sporadic disconnect issues

Question

Users are experiencing AVD sporadic disconnect issues

Bruce Cola 0

Users are sporadically disconnected from their AVD session. Sometimes it automatically restarts and resumes previous session with all open apps and sometimes users must re-authenticate to a new session.

Manish Deshpande 2,930 Reputation points Microsoft External Staff Moderator

2026-02-02T21:03:06.41+00:00
Hello Bruce Cola

Thank you for contacting us about the AVD issue.

Based on Microsoft documentation and field cases, intermittent network drops—especially when using RDP Shortpath (UDP)—are the most common cause of sporadic AVD disconnections.

When UDP connectivity is unstable (firewalls, NAT devices, ISP jitter, or packet loss), AVD may:

Momentarily lose the transport connection

Reconnect automatically (same session)

Or fail to recover and trigger re‑authentication to a new session

This explains the inconsistent user behavior being observed. Microsoft confirms that Shortpath connectivity failures frequently result in intermittent disconnects.

Steps to perform :

1.Validate RDP Shortpath Connectivity :

If RDP Shortpath is enabled, confirm that all Shortpath requirements are met:

Managed networks: UDP 3390 open

Public networks: UDP 50000–60000 open

ICMP not blocked (needed for MTU discovery)

No firewall or security appliance prematurely closing UDP sessions.

2.Temporarily Disable RDP Shortpath :

As a stabilization step, disable RDP Shortpath to force AVD to use TCP reverse connect over port 443, which is more tolerant of unstable networks.

This has resolved sporadic disconnects in multiple Microsoft‑validated customer cases.

Azure Portal Host pool → Networking → RDP Shortpath → Disable.

3.Check AVD Agent Health on Session Hosts

On affected session hosts:

Verify RDAgentBootLoader service is running

Review Event Viewer → Application logs

Look for common disconnect indicators (Event IDs 3703, 3277)

4.Review Network Path Stability :

Microsoft recommends validating real‑world network stability:

Continuous ping from client to session host

Check for packet loss, jitter, or MTU issues

Verify no SSL inspection or forced tunneling on AVD traffic

5.Ensure Clients Are Up to Date :

Outdated AVD client versions have historically caused random disconnect behavior. Ensure users are running a current Windows App / Remote Desktop Client version.

https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-desktop/troubleshoot-agent

Thanks,
Manish Deshpande.

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Answer 1

Users experiencing sporadic disconnect issues in Azure Virtual Desktop (AVD) may be facing several underlying causes. Here are some troubleshooting steps that could help resolve these issues:

Network Configuration: Ensure that SSL inspection/termination is disabled for networks used by your Cloud PCs. This can help prevent connection interruptions.
Third-Party Software: If using third-party software web gateways, make sure that forced tunnel exceptions are in place for critical Azure Virtual Desktop traffic to maintain stable connections.
Group Policies: Connection problems might be caused by settings delivered by group policies. Moving the Cloud PC to a new organizational unit (OU) that is blocked from receiving group policies can help test this issue.
Reconnection Behavior: Depending on the session lock behavior configured, users may either be disconnected or shown a remote lock screen when a session is locked. This can affect how users reconnect to their sessions.

If users are sometimes required to re-authenticate, it may be due to the session lock behavior or network interruptions that cause the session to disconnect.

For a more tailored solution, reviewing logs and connection settings specific to your environment may provide additional insights into the disconnect issues.

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Users are experiencing AVD sporadic disconnect issues

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