Offline caching not working when accessing DVLS via Azure App Proxy

Hello Joe,
Based on the behaviour you described (entries intermittently becoming read-only, actions greyed out, and vaults appearing empty until you toggle offline/online), this strongly suggests RDM is intermittently falling back into an offline/degraded state and then relying on the local cache. When the effective offline access resolves to Read-only (or the cache for a vault is not yet built), you can see exactly the symptoms you are reporting.
To narrow this down, could you please provide the following at the moment the issue occurs (when “Open session” / “Properties” are greyed out or when a vault shows “no access”)?

1. RDM state

• Does the “Go offline” indicator in RDM’s status bar switch to Offline (orange) when this happens?

1. Effective offline configuration (single screenshot or copy/paste is fine)

• In RDM: File – My data source information (this shows “Allow offline mode”, auto refresh state, and effective rights)

1. Offline mode settings (confirm the effective values)

• In RDM (DVLS data source): Data source properties > Edit data source > Advanced tab > Caching mode (Disabled / In-memory / File)
• In RDM: Administration – System Settings – Cache/offline > Offline mode (Cache-only / Read-only / Read/write)
• In DVLS: Administration – System settings > Users > “RDM offline mode.”
• In DVLS: Vault settings > Security settings > “Allow offline” is enabled (and confirm the vault security level is not set to High)

In the meantime, you can also try these quick actions:

• Press Ctrl+F5 to force a refresh of the local cache when entries are missing.
• If the cache seems stuck/out-of-sync, delete the offline cache file (offline.db) for that data source and let it rebuild (close RDM first).

Documentation (for reference)

• DVLS offline mode configuration (including required settings and effective access rules): https://docs.devolutions.net/rdm/data-sources/offline-mode/devolutions-server-offline-mode/
• Offline mode overview: https://docs.devolutions.net/rdm/data-sources/offline-mode/
• My data source information: https://docs.devolutions.net/rdm/commands/file/my-data-source-information/
• Offline mode troubleshooting (Ctrl+F5, delete offline.db): https://docs.devolutions.net/rdm/kb/troubleshooting-articles/offline-mode/
• Status bar “Go offline” indicator: https://docs.devolutions.net/rdm/user-interface/status-bar/

Best regards,

Hi Patrick,

Thanks for assisting with this one.

Yes it does appear RDM is reverting to offline mode behavior, even though it is reporting that the data source is online. The issue occurs when caching set to 'memory' which I think rules out file corruption. Auto refresh not enabled.

Pressing CRTL+F5 does make the entries come back after getting to state where RDM says 'no entries accessible', but RDM locks up for minutes (or indefinitely) while it is (re)populating local cache.

RDM works fine via Azure App proxy if caching is disabled. When RDM has direct connection to DVLS, caching works fine, which I think implies the server-side settings are ok.

Appears as though caching is broken when using Azure App Proxy, in the sense that it runs modally and causes app to be unresponsive, along with retrieval buffering times outs resulting in a pseudo offline mode and/or corrupted cache.

Are you able to reproduce any of this behavior on your end?

Joe

Hello Joe,

Thank you for this feedback.

I can't reproduce this issue.
I will open a ticket and send you a link to schedule a session and have a look.

Best regards,

Hi Patrick,

Have scheduled call for next week.

Can also confirm the same behavior exists with RDM 2026.1.10 connecting to DVLS 2025.3.15

Joe