Action Required: Upgrade to TLS 1.2 or later

Blocking the requests with TLS1.1 or lower for all tenants is not going to work for us. Is there any chance that first we start with DEV tenant blocking the requests with lower TLS version and then UAT tenants. So that we can identify the issues and fix them. Finally we can proceed to PROD tenant.
Also we are not sure about the request that which client/application is using which TLS version. Is there any way to find those.
Its very difficult to have all our client application to upgrade the TLS version. Dont know how its going to be. We would at least need 6 months time.

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