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LucaPaleari
Newcomer
LucaPaleari
Newcomer
December 5, 2025
Question

ZVA and Manage Engine integration

  • December 5, 2025
  • 1 reply
  • 33 views

Hi everyone.

 

I'm trying to setup the integration between AVZ and Manage Engine ServiceDesk Plus.

Based on the KB https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0057946 I insert "itdesk" and select my region (EU).

 

I'm redirected to the auth page on Zoho but after the authentication process I land on an error page that says: 

 

Invalid Client
Client ID passed does not exist
 
Any idea?
Is the ServiceDeskPlus supported or do I miss something?
"itdesk" refers to other ManageEngine products?
 
Regards
Luca
 
 

1 reply

V
Employee
VanessaVaZoomie
Employee
March 12, 2026
  1. ​@LucaPaleari - I didn’t see this on the list of new posts and I apologize for the amount of time you had to wait for an answer. Did you submit a support ticket for this? 

    Without seeing exactly what you did and how your Manage Engine ServiceDesk Plus environment is implemented, the error you are receiving indicates that the region you selected for the connector is not the region that your Zoho/Manage Engine environment is in. 
     

    “Invalid Client, Client ID passed does not exist”error usually means the OAuth app details being sent to Zoho are not being recognized, not that your username/password are wrong.

    Basically, Zoho received a client_id in the authorization request, but it doesn’t match a valid app in the Zoho environment/domain you’re hitting. Zoho’s docs note that invalid client errors happen when the client ID/secret is wrong or when there is a domain mismatch between where the client was created and where auth/token requests are being made. Zoom’s OAuth error guide says the same pattern applies on their side too: an invalid client error typically means the client credentials are incorrect or the app does not exist.


    Zoho data center / domain mismatch
    This is a very common Zoho issue. If your Zoho app was created in one data center and the auth flow is using another, Zoho may say the client does not exist. Zoho documents that OAuth endpoints are region-specific, such as accounts.zoho.com for US, accounts.zoho.eu for EU, accounts.zoho.in for India, and so on. Zoho also explicitly says invalid_client can happen when the client is registered in one domain and token generation happens in another.

    More likely, the Zoom marketplace connector is sending Zoho an authorization URL with a client_id that Zoho cannot find in that region/environment. That points to misconfigured OAuth settings rather than a bad user login.
     

  2. The app was created under a different Zoho account/org than the one being used in the flow
    Zoho’s SDK/docs say the OAuth client registration and grant generation need to be done in the same Zoho account/developer console context. This is another common cause we see for the error. You enter your credentials but they are not the same developer account that is allowed to authorize OAuth connectors. Ask your IT team for what user credenitals you should be using to authorize the ZVA connector with your ZoHo/Manage Engine.


    Verify the region in Zoho and what you entered in ZVA then check the Zoho account permissions for OAuth connectors. 

    Hope that helps! Tag me back if you already discovered what the cause was and how to fix it. 

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