Enable two-factor-authentication for free Outlook email account and get app password to sign in with email client at https://account.live.com/proofs/Manage
Gign in and go to App Password section to create/remove password.
Delete cached files on server running IIS When changing css, javascript files, check to delete if IIS still caches old files in the default folder C:\inetpub\temp\IIS Temporary Compressed Files\<sitename>\$^_gzip_D^\ Apply to: IIS 8.5