AZIdentity

This one is short and sweet:  people want to know the maximum number of objects in an Azure Key Vault.  Per the Azure Key Vault product team:

• There is no limit on number of keys, secrets, or certificates in a Key Vault.
• There is no maximum number of versions of secrets, keys or certificates.
• The maximum number of access policies in a Key Vault as of March 2019 is 1024.

I hope this helps.