@Anon4343 Thank you for reaching out to us, As I understand while upgrading Microsoft Entra ID Connect - came across this issue, in the logs you see the below information
Object reference not set to an instance of an object.
[13:40:14.686] [ 1] [INFO ] SyncDataProvider:LoadSettings - loading context with global settings.
[13:40:14.691] [ 1] [INFO ] SyncDataProvider:LoadSettings - retrieving global settings from the sync engine.
[13:40:14.946] [ 1] [ERROR] Unable to get value for Microsoft.OptionalFeature.EnableAutoUpgrade global parameter.
[13:40:14.956] [ 1] [INFO ] SyncDataProvider:LoadSettings - retrieving connector from the sync engine.
Could you provide more details to investigate this issue further
- Environment details (previous version of Microsoft Entra ID Connect, Operating system )
- Any issues with replication in your on-premise AD environment.
- Event viewer details (any kerberos errors identified in the application/system logs at the time of installation) on the Microsoft Entra ID Connect server.
- Do share the installation log file to review further.
Also refer to this https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/reference-connect-version-history which has details on the functional changes in each version.
https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/reference-connect-accounts-permissions - Accounts and Permissions
Let me know if you have any further questions, feel free to post back.