I am working to migrate an Excel Add-in from the old Custom Functions runtime to the new Shared Runtime. We have noticed some of our users don't receive the updated manifest as quickly as others. Therefore, there will be a cross-over period where some of our users have the Shared Runtime manifest and others use the old Custom Functions Runtime manifest. We need some way to detect who's actually running the Shared Runtime, and who's not.
We've found checking isSetSupported('SharedRuntime')
returns true, even if the shared runtime is not set in the manifest (particularly on Mac/Online).
Is there a way in the OfficeJS API to determine if the Shared Runtime is active and being used?