Hi @john john
You could still use Azure AD APP-Only.
However, take attention: If you choose not to migrate to MSAL before ADAL support ends on June 30, 2022, you put your app's security at risk. Existing apps that use ADAL will continue to work after the end-of-support date, but Microsoft will no longer release security fixes on ADAL.
For more information, you could refer to:
https://learn.microsoft.com/en-us/azure/active-directory/develop/msal-migration
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