How to Fix Mendeley Add-In Catalog Connection Error in Word 2016
Question details
The user is unable to install the Mendeley add-in due to a catalog connection error blocking access to Microsoft AppSource.
- Product
- Microsoft Word 2016
- Device & OS
- Windows
- Scenario
- Attempting to install the Mendeley add-in directly through Word 2016's built-in store or catalog.
- Observed behavior
- Word 2016 fails to connect to the catalog and displays an error message, preventing the add-in from installing.
Ensure you have administrative privileges on your computer, as modifying Windows Firewall settings requires admin access.
Temporarily Disable Windows Firewall
Disabling the firewall helps identify if network security restrictions are actively blocking Word's connection to Microsoft AppSource.
Windows Firewall or third-party security software can sometimes mistake catalog connection attempts for suspicious network activity. Temporarily disabling it allows you to bypass this restriction for the installation.
Press the Windows key, type 'Windows Defender Firewall' into the search bar, and hit Enter.
On the left side of the window, click on the 'Turn Windows Defender Firewall on or off' link.
Select 'Turn off Windows Defender Firewall' under both the Private and Public network settings, then click 'OK' to apply changes.
Open Word 2016 and try installing the Mendeley add-in again. Wait to see if the connection is successful.
Once the installation succeeds or fails, return to the Firewall settings immediately and select 'Turn on Windows Defender Firewall' to ensure your system stays protected.
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Frequently Asked Questions
Why is Microsoft AppSource blocked in Word 2016?
AppSource connections can be blocked by strict local Windows Firewall settings, corporate network policies, proxy servers, or third-party antivirus software that mistakenly identifies the catalog traffic as a security threat.
Can I install the Mendeley add-in without using the AppSource catalog?
Yes. In corporate or academic environments, you can ask your IT administrator for centralized deployment of the add-in. Alternatively, Mendeley provides manual deployment options on their official website.
What should I do if turning off the firewall doesn't fix the connection error?
If disabling the firewall does not resolve the issue, try temporarily disabling any active VPNs or proxy servers. Additionally, ensure that your installation of Word 2016 is fully updated, as outdated software can cause server connection failures.
