The Clipboard diagnostic tool in Remote Desktop Manager helps to identify which applications are interfering with the Copy username, Copy password, and Copy username and password features. It monitors clipboard access in real time and lets users configure exactly which processes are allowed or blocked from reading the clipboard.
Use this tool whenever a copied credential seems to disappear before its is pasted, or when the wrong value ends up in the clipboard.
Open Remote Desktop Manager and go to the Help menu.
Select Clipboard diagnostic.
Enable Grab the keyboard input (bottom-right corner of the main window) before opening the diagnostic when troubleshooting keyboard-related clipboard issues.
The Status tab shows every process that has accessed the clipboard since the diagnostic was opened. Each entry displays:
| SETTINGS | DESCRIPTIONS |
|---|---|
| Process | Name and PID of the process that read the clipboard. |
| Status | Whether the process is Allowlisted, Blocklisted, or Detected (not yet classified). |
| Command line | Full command line of the process (useful to distinguish multiple instances of the same executable). |
Allowlisted processes are permitted to receive clipboard content normally. Remote Desktop Manager feeds them the credential and advances the PasteOnce sequence.
Blocklisted processes are silently denied. They receive no data from the clipboard when Remote Desktop Manager controls it.
By default, the foreground application (the window pasted into) is automatically allowlisted after it reads the clipboard.
In the Status tab, right-click the process to be blocked.
Select Add to blocklist.
The rule is saved persistently and applies to all future sessions. The process name is matched; if the same application runs under a different PID later, it will still be blocked.
Right-click a blocklisted or detected process and select Add to allowlist if it should be permitted. This is useful for accessibility tools or automation software that legitimately needs clipboard access.
Right-click any entry and select Remove to delete the blocklist or allowlist rule for that process.
Some applications (notably Chrome-based browsers) request clipboard content multiple times in rapid succession. In the Delays section, users can add a per-process delay so that Remote Desktop Manager waits before advancing the PasteOnce sequence, giving the application time to complete all its internal reads.
| Setting | Description |
|---|---|
| Process | Name of the application to apply the delay to. |
| Delay (ms) | How longRemote Desktop Managerwaits before calling SetNextClipboardData. |
Suggested starting values:
Chrome / Edge / Electron apps: 150–200ms
If issues persist: increase to 500ms
Starting with version 2026.1, Remote Desktop Manager automatically detects and handles clipboard managers (such as CLCL, Ditto, or ClipX) that would otherwise consume copied credentials before you can paste them.
This protection is fully automatic, no configuration required. Clipboard managers still capture entries in their history as expected, and your manual pastes continue to work normally. Multiple clipboard managers running at the same time are each handled independently.
On virtualized desktops or high-latency environments where this protection does not appear to be working, the sensitivity can be adjusted via the ClipboardAutoReaderThresholdMs NoUI option. See Advanced NoUI Options below.
The following applications are known to interfere with clipboard operations and should be blocklisted if present:
| Application | Executable |
|---|---|
| Phone Link (Windows) | PhoneExperienceHost.exe |
| Microsoft Azure Storage Explorer | StorageExplorer.exe |
| Citrix GoToAssist | varies |
| Microsoft Garage Mouse without Borders | varies |
| TeamViewer | TeamViewer.exe |
If you are using CLCL, Ditto, ClipX, or another clipboard manager, the Auto-reader detection feature (2026.1+) handles these automatically. You do not need to blocklist them.
The Send button at the bottom of the Clipboard diagnostic window transmits the full diagnostic report to the Devolutions Support. Always send this report when opening a support ticket related to clipboard issues. It includes the process list, blocklist/allowlist configuration, and relevant option values, giving support everything they need to diagnose the problem remotely.
These options are not exposed in the UI and must be set via XML configuration or registry. Contact Devolutions' support team for help if needed.
| Option | Type | Default | Description |
|---|---|---|---|
| ClipboardAutoReaderThresholdMs | int | 500 |
Time in milliseconds after arming within which a read is classified as an automated reader (clipboard manager). Increase if auto-detection is missing reads on high-latency systems. |
| ClipboardSendSecureClipboardFormatsWithPasteOnceSecure | bool | true |
Whether to include private clipboard formats (CanIncludeInClipboardHistory, etc.) when arming PasteOnce Secure. Disable only if a specific application is broken by the presence of these formats. |
| ClipboardSendSecureClipboardFormatsWithLegacy | bool | false |
Same as above but for the legacy clipboard copy method. |
| EnableClipboardViewerDisabler | bool | false |
Restores the pre-2024.3 clipboard viewer blocking behavior. Only enable this if directed by support. |
Share your feedback