Thanks. I read that article and it was very helpful. I'm in the middle of creating the new sync rule. However, I'm having trouble with the syntax to create an expression for the transformations option:
I would think that in order for the AD attribute 'displayName' to have lastname/firstname reversed I hav to put some kind of expression here. What syntax/language is this? Is it the same code that Excel would accept?
For example, in your linked article under the section Changing the userPrincipalSuffix
there's an example for what to put in the 'source' field: