How to login office website with your secondary accounts without switching the account.
On desktop right-click > New > Shortcut 
Copy and paste this string C:\Windows\System32\runas.exe /user:XX\XX "C:\Program Files
(x86)\Google\Chrome\Application\chrome.exe"
Under Target, remember to change the login ID to your secondary account login ID
XX = Domains
YY = User account ID
