Azure integration on thirdparty app with existing Entity ID

Roxas, Catherine 1 Reputation point

Hello guys,

Would like to ask a question. Scenario is our company "A" was bought by company "B". Now, we are using domain of company "B". We have a SSO requirement for a third party app. Since we are now using the domain of company "B" we need to use their AD which is Azure. The problem is Azure only gives one Entity ID, we found out that the company "B" has already set up their SSO on this third party app. In this, when I am setting up our SSO it is saying Entity ID already exist. I can't configure SSO using company "B" azure SSO since they are already using it on their Third party app account. I am sure it is not only us having this issue. Can anyone share what adjustments they did :) thank you!

Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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  1. Marilee Turscak-MSFT 35,806 Reputation points Microsoft Employee

    Hi @Roxas, Catherine ,

    Thanks for your post and apologies for the delayed reply! As you correctly noted, you cannot use the same Entity ID for two different Enterprise Applications. However, if you can have unique subdomains and have each SAML application point to the unique id of each subdomain.

    For example, you can have something like the following:

    So you would have separate enterprise applications for each subdomain where MyApp1 points to and MyApp2 points to

    See related discussions:
    Azure SSO Config one app multiple domains
    Using different subdomains of the same domain for different Azure app services


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