@Ram Murugan - Thanks for the question and using MS Q&A platform.
Based on the document: Microsoft Purview disaster recovery, and migration best practices, Microsoft Purview does not support automated BCDR. Until that support is added, you are responsible for taking care of backup and restore activities. You can manually create a secondary Microsoft Purview account as a warm standby instance in another region.
To answer your questions:
- The document does not mention whether the Purview account is provisioned in three different Availability Zones within the Australia region or whether Purview's multi-AZ feature is enabled by default. You may want to check with Microsoft Azure support for more information on this.
- If one of the data centers (i.e., one of the Availability Zones) is affected by natural disasters while the other two Availability Zones remain unaffected, your Purview account should continue to operate with the 100 metadata objects from the unaffected Availability Zones.
- If all data centers are affected by natural disasters (all data centers are down in the Australia region), your Purview account would be inaccessible during this period. Once the data centers have recovered, you should be able to resume using Purview along with the 100 metadata objects.
- If all data centers are affected by natural disasters (all data centers are down in the Australia region) and all the data centers have completely disrupted, your organization may lose all the Purview configuration along with the 100 metadata objects. This is why it is important to have a disaster recovery plan in place.
Regarding your shared responsibilities, as a customer, you are responsible for setting up a secondary Microsoft Purview account in another region and carrying out all activities in both regions. Microsoft recommends that you manually create a secondary Microsoft Purview account as a warm standby instance in another region.
Hope this helps. Do let us know if you any further queries.