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(403) Forbidden error in Veeam Monitor



Get Error Message on vCenter Server or VMware ESX(i) host shows the following output: Error 403: Forbidden.

You may also see the following errors/information in the VeeamDCS logs (default path: C:\ProgramData\Veeam\Veeam Monitor for VMware):

Inform  0x0534 YourVCName "Opening URL 'https://YourVCName:443/client/clients.xml'"
Error   0x0534 YourVCName  "Unable to load/parse clients.xml: The remote server returned an error: (403) Forbidden."
Error   0x0534 YourVCName "XML Content: (null)"
Error   0x0534 YourVCName "Collecting thread has failed to initialize (The remote server returned an error: (403) Forbidden.) and will be stopped"


SSL certificate from VMware was added to the Veeam Monitor server incorrectly, or SSL certificate expired.


On the Veeam Monitor server, open the following link using your Internet browser:


Save the SSL certificate information (through the web browser).

Alternatively, you can install vSphere Client to the same server on which the Veeam Monitor server is installed. Then use the vSphere Client to connect to the ESX host you are trying to add to Veeam Monitor. Apply the certificate during the vSphere host connection process.

Please make sure you have ENABLED the Install this certificate and do not display any security warnings for "your_host" option.

More information

If you have any questions or problems, please contact Veeam Support at

Veeam ONE
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