@scott-sa-spiceworks okay, I "edited" the passwords for Office to my current one in that credential box but it did not help. Each firewall will have a different method to enable access to these URIs. Check your software's documentation for instructions or ask your Office 365 troubleshooting administrator to do this for you. You can also allow Microsoft 365 to bypass the proxy server by creating a PAC fil Our process includes a clear assessment, preparation of your systems and data, data tra...