How to

Restore Collabora CODE Settings Without Losing Deployment Changes

Back up coolwsd.xml and its deployment sources, restore them safely, and verify CODE before users return to editing.

Fix CODE’s WOPI Host Check by Matching the Host Origin

Allow the exact Nextcloud or other WOPI origin in CODE, then verify the active host allow-list and distinguish it from Nextcloud’s source-IP restriction.

Resolve Collabora’s “Well, This Is Embarrassing” Error

Trace Collabora’s browser, WOPI, and WebSocket connections to find why a document will not open, then apply the fix that matches your Nextcloud setup.

Run Collabora Online Across Kubernetes Nodes

Deploy Collabora CODE replicas with Helm, keep each document on one pod through WOPI affinity, and verify ingress, node placement, and Nextcloud editing.

Restore Collaboras WebSocket Connection Through the Proxy

Trace a failed socket handshake from browser to coolwsd, then match the reverse-proxy route to your Collabora version, including the CODE 26.04 Apache change.

Fix WOPI Proof Errors by Checking Keys, Discovery, and URLs

Trace Collabora WOPI proof failures to mismatched keys, stale discovery data, clock drift, or proxy URL changes—without weakening validation.

Fix a Misrendered Collabora Online Font Size Dropdown

Reset browser zoom, test a clean session, and identify when a malformed size menu needs a Collabora server update.

Connect Nextcloud to a Self-Hosted Collabora CODE Container

Deploy Collabora CODE with Docker, connect it securely to Nextcloud Office, and verify document editing with practical WOPI and proxy checks.

Trace Collabora Connection Failures with coolwsd Logs

Temporarily raise coolwsd to debug, capture one failed open, and use the log sequence to separate WebSocket, WOPI, proxy, and container issues.

Set a Secure Password for the Collabora Admin Console

Configure the Collabora Online admin login for Docker or Linux, restart the right service, and verify the new password without exposing it.

Diagnose High CPU from Collabora’s coolwsd or loolwsd

Find out whether CPU load comes from active documents, idle worker processes, or server capacity before changing Collabora settings or restarting the service.

Raise the CODE Container’s Memory Cap Without Guessing

Check whether Docker is capping Collabora CODE, raise the Compose memory limit safely, and confirm the running container received the new cap.

Customize Collabora CODE Toolbars Without Editing Source

Simplify Collabora CODE with Compact or Tabbed mode and WOPI PostMessage controls to hide selected buttons, commands, and tabs safely.

Run Collabora CODE Behind Nginx with TLS Termination

Put Nginx in charge of HTTPS for a Collabora CODE container, forward editing WebSockets correctly, and verify the public endpoint without exposing port 9980.

Keep Text Visible When the Collabora Mobile Keyboard Opens

Troubleshoot a mobile browser keyboard covering text in Collabora Online, with quick workarounds and separate checks for browsers, embedded WebViews, and host pages.

Stop Unwanted Printing and Downloads in ONLYOFFICE

Set print and download limits for ONLYOFFICE links, room members, or Docs API sessions, then verify the restrictions from a recipient account.

Schedule Reliable Backups for ONLYOFFICE Workspace

Set a backup destination, schedule, Mail coverage, and retention limit in ONLYOFFICE Workspace, then verify the archive is ready to restore.

Deploy ONLYOFFICE Docs Enterprise with Its Official Compose File

Start the Enterprise Docker Compose stack, persist its license and data, configure JWT safely, and confirm the editors are ready to integrate.

Clean Spreadsheet Text with a Reusable ONLYOFFICE Macro

Use an ONLYOFFICE JavaScript macro to remove nonprinting characters and trim extra spaces from a defined spreadsheet range, with a safe review workflow.

Sync Active Directory Users with ONLYOFFICE DocSpace via LDAP

Connect ONLYOFFICE DocSpace to Active Directory or OpenLDAP, import users and groups safely, map account fields, and schedule reliable synchronization.

Change ONLYOFFICE Workspace’s Default Storage Location

Move portal data from Disk Default to a supported cloud storage provider, or relocate Docker data safely by changing its host volume mapping.

Completely Remove ONLYOFFICE Document Server from Linux

Identify whether Document Server uses a Linux package or Docker, remove only its components, and check remaining data without deleting shared services by mistake.

Stop ONLYOFFICE Co-Editing Lag by Finding the Bottleneck

Trace slow collaborative editing to Docker resource pressure, proxy connections, or document load, then choose the fix that matches your measurements.

Add Fonts to ONLYOFFICE Document Server: Docker vs Linux

Install custom fonts in ONLYOFFICE Document Server, compare persistent Docker mounts with direct copies, rebuild the font list, and verify the result.

Configure HTTPS for ONLYOFFICE Docs in Docker

Choose where TLS should terminate, mount a trusted certificate and private key safely, and verify HTTPS access to a Dockerized ONLYOFFICE Docs server.

Connect a PHP App to ONLYOFFICE Docs and Save Edits

Embed the ONLYOFFICE editor in your PHP app, sign its configuration with JWT, and save edited files through a secure callback.

Keep ONLYOFFICE Spell Check on the Language You Choose

Set the proofing language for the whole document or selected text, confirm spell checking is active, and identify when a server dictionary is missing.

Keep Track Changes On When a Document Reopens

Enable persistent Track Changes for everyone in one ONLYOFFICE document, verify edits are recorded, and understand the limits of this setting.

Trace the Upstream to Clear ONLYOFFICE’s Nginx 502

Find whether Nginx, Docker networking, or an internal ONLYOFFICE service is returning 502, then verify the corrected upstream and health check.

Trace the Save Callback When ONLYOFFICE Won’t Save to Nextcloud

Diagnose failed ONLYOFFICE saves by checking the Nextcloud callback route, proxy redirects, and storage logs, then verify the edited file persists.