A family of Microsoft word processing software products for creating web, email, and print documents.
I'm not sure if this is a bug or a security feature which was enabled after the last update. Is there a way to disable this warning when doing mail merges?
It is a bug in the last update, and it is what Microsoft's team is working to resolve. When the fix is released, the security notice should not pop up when it isn't appropriate, i.e., during a merge or after pasting a benign object from another location. Until that fix arrives, though, the rollback that you did is the only way to avoid the notices.