Citrix XenApp 6.5 Service account password change caused console discovery to fail and we saw event ID 3989 in System Event logs "Citrix XenApp failed to connect to the Data Store. ODBC error while connecting to the database: 28000 -> [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed. The login is from an untrusted domain and cannot be used with Windows authentication." After changing the service account password needed to run the following command on the delivery controllers. DSMAINT CONFIG /user:abc\ABCSVCCitrix /pwd:nP@ssword /dsn:"C:\Program Files (x86)\Citrix\Independent Management Architecture\mf20.dsn" Restart IMA service You should now be able to run the discovery successfully Hope this helps