Ensure every machine in your organization utilizes the exact same build version of the proofing dictionaries.
It is crucial to always download software directly from Microsoft or a trusted partner to avoid malware and ensure compatibility. The following are the official pathways to get an offline-capable installer for Office 2021 proofing tools. There isn't a single direct download link for a "proofing tools offline installer," but rather, you can create a complete offline installation package that includes these tools. office 2021 proofing tools offline installer best