Hi @Alnasheet Thank you for reaching out to us, As I understand you are looking for details about Upgrading Microsoft Entra Connect Sync notification.
Would recommend you to upgrade at earliest, On October 1, 2023, Azure AD cloud services will stop accepting connections from Azure AD Connect V1 servers, and identities will no longer synchronize. You need to migrate to cloud sync or connect sync V2.
To answer your query - how can I check if it's enabled/working?
Please navigate to this section of Azure AD/Microsoft Entra ID (as mentioned in the below screenshot), will provide all details like Server name which is being used to sync the objects/time when last synced/more configuration related to password sync/pass through authentication.
Do refer to this article - https://learn.microsoft.com/en-us/azure/active-directory/hybrid/decommission-connect-sync-v1 which provides information related to upgrade process, as you mentioned you have 2012 server, as per pre-requisites for cloud sync or Microsoft Entra Connect we need Windows Server 2016 - https://learn.microsoft.com/en-us/azure/active-directory/hybrid/prerequisites all pre-reqs are defined here for your reference.
Let me know if you have any further questions, feel free to post back.
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