Today I ran into issue. 

We have multiple business units (say A,B,C,D) that share contact accounts. Customs can access more than one business unit.

The problem I have is that when a BU administrator changes or edits an (linked) account in BU C, the changes will be made to all BU's. 

Ideally I would have an option to not allow BU admin's to change/edit account that are linked to multiple BU's. Only global admin's should be able to edit these account.

But I would also settle for a "History" tab like you have in the requests module.

Is there any way for me to track who made changes to accounts?

Best regards,

Allistair