public void setDomainOu(String domainOu) {
        this.domainOu = domainOu;
    }
<p>
The Active Directory organizational unit for your DB instance to join.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must be in the distinguished name format.
</p>
</li>
<li>
<p>
Can't be longer than 64 characters.
</p>
</li>
</ul>
<p>
Example: <code>OU=mymanagedADtestOU,DC=mymanagedADtest,DC=mymanagedAD,DC=mydomain</code>
</p>

@param domainOu
       The Active Directory organizational unit for your DB instance to join.</p>
       <p>
       Constraints:
       </p>
       <ul>
       <li>
       <p>
       Must be in the distinguished name format.
       </p>
       </li>
       <li>
       <p>
       Can't be longer than 64 characters.
       </p>
       </li>
       </ul>
       <p>
       Example: <code>OU=mymanagedADtestOU,DC=mymanagedADtest,DC=mymanagedAD,DC=mydomain</code>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/CreateDBInstanceReadReplicaRequest.java