Perform the following in the Azure Console:

1. Go to Key vaults
2. For each Key vault, click on Keys.
3. Under the Settings section, Make sure Enabled? is set to Yes
4. Set an appropriate EXPIRATION DATE on all keys.

Perform the following in Azure Command Line Interface 2.0:

Update the EXPIRATION DATE for the key using below command.

az keyvault key set-attributes –name <keyName> –vault-name <vaultName> –expires Y-m-d’ T ‘H:M:S’ Z ‘

References:

1. https://docs.microsoft.com/en-us/azure/key-vault/key-vault-whatis
2. https://docs.microsoft.com/en-us/rest/api/keyvault/about-keys–secrets-and-certificates#key-vault-keys