SQL server logs report repeated login failures with the following description: Login failed for user ''. Reason: Failed to open the explicitly specified database 'NintexForms'.
Get-SPDatabase command to confirm that the database connection exists.
Get-SPDatabase | fl name,id to obtain the ID of the NintexForms database.
$db = Get-SPDatabase <ID>. Replace <ID> with the ID number from above.
$db.Delete() to remove the reference from your SQL instance.
- Repeat step 1 to verify that it is now removed from the list.