Is it possible to modify a metadata field for all existing entities in the system?

Question
Is it possible to modify a metadata field for all existing entities? For instance, the option 'Add to calendar' for all Request entities already created.

Answer
There is no functionality to modify a metadata field of all existing entities.

Please note that when metadata properties are modified, changes will apply only to newly created entities. Existing entities will not be affected by this modification until they are edited and saved again.