Manage external users in Azure active directory and password expiry policy in Office 365

Hi Team,

In SharePoint 2013 Online (Office 365), we are looking that internal and external users should able to access, collaborate and manage documents in the SharePoint team site.

We are planning that we should create Azure AD account for external users.

Please suggest.

1. How Admin will deactivate the azure account, so that user should not able to access the site and not able to perform any action, but account should not be deleted, so that they can provide access to the site in future, if needed.

1. External user should able to Change, forget password, we are planning as per this articlehttps://azure.microsoft.com/en-us/documentation/articles/active-directory-passwords/

1. Password expiry policy can be set as per this approach https://support.office.com/en-us/article/Set-a-user-s-password-expiration-policy-0f54736f-eb22-414c-8273-498a0918678f?CorrelationId=6b17bb0e-2f6c-48ae-bd1d-d43569dd3f18&ui=en-US&rs=en-US&ad=US&ocmsassetID=HA102816546

Let me know, if you all feel any different approach.

Any approach, information, code about this would be greatly appreciated. Thanks!