@Peizhu S - Thanks for the question and using MS Q&A platform.
To access existing glossaries from the new Purview Portal, you need to have the required permission "Microsoft.Purview/datagovernance/businessdomain/read". This permission is required for the Business Domain Owner role and the Data Steward role
Ownership of data is an important aspect of data governance. However, today data is maintained and supported by IT infrastructure that doesn't always have the full context for how data can and should be used in an organization. Enter the business domain that brings users and data together with a data-use driven structure.
This article covers how to create and manage business domains in Microsoft Purview. For more information about business domains in general, see our business domains concept page and How to create and manage business domains (Preview). Hope this helps. Do let us know if you any further queries.
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