If you’re directly accessing the backup protected items REST API (not involving Azure portal, PS, or CLI), please immediately switch to API version 2019-05-13 or above.
Support for API versions previous to 2019-05-13 will end the week of October 1, 2019 (deployment is already in progress and exact dates will be updated later). This was caused by an issue in certificate rollover. We reviewed all affected APIs and have identified only API version 2019-05-13 as getting impacted.
If you’re using this API to retrieve file-folder backup via Microsoft Recovery Services (MARS) agent items, then the API versions previous to 2019-05-13 have a contract change. The relevant Swagger API publishing is also in progress and exact dates will be updated soon.
If you’re currently retrieving Microsoft Recovery Services (MARS) agent items with this API and can’t wait until Swagger is published, please email us.