# Have CloudTrail deliver log files from multiple AWS accounts into a Single S3 bucket

* You can **have CloudTrail deliver log files from multiple AWS accounts into a single S3 bucket**.<br>

* For example, you have **four AWS accounts with account IDs 111111111111, 222222222222, 333333333333, and 444444444444**, and you want to **configure CloudTrail to deliver log files from all four of these accounts to a bucket belonging to account 111111111111:**

  1. **Turn on CloudTrail in the account where the destination bucket will belong** (111111111111 in this example).
  2. **Update the bucket policy on your destination bucket to grant cross-account permissions** to CloudTrail.
  3. **Turn on CloudTrail in the other accounts you want (222222222222, 333333333333, and 444444444444 in this example)**.
  4. **Configure CloudTrail in these accounts to use the same bucket belonging to the account that you specified in step 1** (111111111111 in this example).

* The **Log File Prefix is just optional and doesn't need to be identical to the name of the S3 bucket**.<br>

* **Ensure that each trail is active using the CloudTrail console** and **verify that the specified destination S3 bucket name is correctly configured**.


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