SQL Server Connected system OAuth2.0 Test failure

There should be a more concise error in System Logs > tomcat-stdOut.log. Could you post that exception here? Without a more concise error, we're guessing about many variables related to your Appian configuration and where your database lives.

IF your database is in Azure Cloud, also check these:

• On a different project / platform, AzureTenant JDBC property needed to be added to the JDBC connection string for a Teams integration that also used ServicePrincipal. I'm not sure if that applies to your situation, but it's pretty easy to test.
• Appian might have additional VPN requirements depending on your environment's configuration:
  docs.appian.com/.../Microsoft_Azure_DB_Integration_Appian_Cloud.html

I already tried to find the error in logs but could not obtain anything specific.

2025-09-25 01:36:31,065 [Appian Timer - 1] WARN com.appiancorp.common.ObjectSynchronizer - 1 services were missing users.
2025-09-25 01:36:57,229 [pool-109-thread-1] INFO com.appiancorp.oauth.inbound.authserver.tokens.TokenFamilyMaintenanceRunnable - Starting OAuth Token Family table maintenance...
2025-09-25 01:36:57,232 [pool-109-thread-1] INFO com.appiancorp.oauth.inbound.authserver.tokens.TokenFamilyMaintenanceRunnable - Finished OAuth Token Family table maintenance.
2025-09-25 01:40:17,842 [Appian Timer - 3] ERROR com.appiancorp.common.monitoring.AbstractLogScheduler - Error logging for class com.appiancorp.object.versions.monitoring.DesignObjectVersionMetricsLogScheduler
com.appiancorp.suiteapi.common.exceptions.AppianException: Invalid Type: {www.appian.com/.../2009}TranslationString (APNX-1-4047-000)

I already tried to find the error in logs but could not obtain anything specific.

2025-09-25 01:36:31,065 [Appian Timer - 1] WARN com.appiancorp.common.ObjectSynchronizer - 1 services were missing users.
2025-09-25 01:36:57,229 [pool-109-thread-1] INFO com.appiancorp.oauth.inbound.authserver.tokens.TokenFamilyMaintenanceRunnable - Starting OAuth Token Family table maintenance...
2025-09-25 01:36:57,232 [pool-109-thread-1] INFO com.appiancorp.oauth.inbound.authserver.tokens.TokenFamilyMaintenanceRunnable - Finished OAuth Token Family table maintenance.
2025-09-25 01:40:17,842 [Appian Timer - 3] ERROR com.appiancorp.common.monitoring.AbstractLogScheduler - Error logging for class com.appiancorp.object.versions.monitoring.DesignObjectVersionMetricsLogScheduler
com.appiancorp.suiteapi.common.exceptions.AppianException: Invalid Type: {www.appian.com/.../2009}TranslationString (APNX-1-4047-000)

Can you replicate this configuration for example via postman and check if it works?

hi Sure.