## Preflight checks for Microsoft SQL Server

URL: https://docs.atlan.com/apps/connectors/database/microsoft-sql-server/references/preflight-checks-for-microsoft-sql-server

> Before [running the Microsoft SQL Server crawler](/apps/connectors/database/microsoft-sql-server/how-tos/crawl-microsoft-sql-server), you can run [prefli.

Before [running the Microsoft SQL Server crawler](https://docs.atlan.com/llms/connectors/microsoft-sql-server/crawl-microsoft-sql-server/llms.txt), you can run [preflight checks](https://docs.atlan.com/llms/catalog/connector-capabilities/what-are-preflight-checks/llms.txt) to perform the necessary technical validations. The following preflight check will be completed:

## Database and schema check

✅ `Check successful`

❌ `Check failed for $missingObjectName`

## Miner

:::info **Did you know?** 
 Once you have crawled assets from Microsoft SQL Server, you can [mine query history](https://docs.atlan.com/llms/catalog/connector-capabilities/mine-queries-through-cloud-object-storage/llms.txt).

:::

### S3 credentials

✅ `Check successful`

❌ `Check failed`

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