# AWS::ACMPCA::CertificateAuthority AccessMethod Structure that contains X.509 AccessMethod information. Assign one and ONLY one field. ## Syntax To declare this entity in your AWS CloudFormation template, use the following syntax: ### JSON <pre> { "<a href="#customobjectidentifier" title="CustomObjectIdentifier">CustomObjectIdentifier</a>" : <i>String</i>, "<a href="#accessmethodtype" title="AccessMethodType">AccessMethodType</a>" : <i>String</i> } </pre> ### YAML <pre> <a href="#customobjectidentifier" title="CustomObjectIdentifier">CustomObjectIdentifier</a>: <i>String</i> <a href="#accessmethodtype" title="AccessMethodType">AccessMethodType</a>: <i>String</i> </pre> ## Properties #### CustomObjectIdentifier String that contains X.509 ObjectIdentifier information. _Required_: No _Type_: String _Update requires_: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt) #### AccessMethodType Pre-defined enum string for X.509 AccessMethod ObjectIdentifiers. _Required_: No _Type_: String _Update requires_: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)