If you only need to open a Microsoft 365 account once, you don't need to create a separate profile for it. Instead, you can use private browsing to open it without having to log out of browser-based Microsoft 365 accounts.

But if you expect to work with that Microsoft account regularly, you should assign a browser profile to make it more convenient to access.


Microsoft Edge

Option 1: Using InPrivate Browsing
  1.  On the top toolbar click on the three horizontal dots. 
  2.  Click the InPrivate Browsing option. This will open a new window for you. 
  3.  In the InPrivate Browsing window, log into another Microsoft 365 account. To make things easier, the keyboard shortcut for this is Ctrl + Shift + N. 


Option 2: Adding Profiles

  1.  Open a new Microsoft Edge browsing window. 
  2.  On the top right of the toolbar click on the image for the user profile. 
  3.  You will have three options: Browse as guest, Browse in Kids Mode, and Add profile. 
  4.  Click on Add profile. 
  5.  You will then be redirected to either sign in to sync your data, or you can continue without syncing your data. 
  6.  Simply confirm the option that suits your needs and start browsing. 

Mozilla Firefox
       

Option 1: Using a New Private Window

  1.  Open your Mozilla Firefox browser. 
  2.  In the top right corner, click on the three-line menu icon and choose New Private Window. This will open a new window for private browsing. 
  3.  In the New Private window, choose another Microsoft 365 account to log into. To make things easier, the keyboard shortcut for this is Ctrl + Shift + P. 


Option 2: Adding Profiles

  1.  Open a new Firefox browser window. 
  2.  In the address bar type about:profiles and press enter/return. 
  3.  At the top of the page, click on Create a New Profile. 
  4.  A Create Profile Wizard will open. Click Next. 
  5.  You will be asked to name the profile, and also give you the option to relocate the profile folder, which you can ignore. 
  6.  Once you have named your profile click Finish. 
  7.  When loading a new profile simply go to the Start menu and type Run. 
  8.  Type firefox.exe -p to open the Firefox profile manager. 
  9.  A Firefox - Choose User Profile window will appear. You can then select the profile you want to use. Furthermore, if you want the option to select the profile you want to use every time you launch Firefox, ensure that Use the selected profile without asking at startup is unselected. Once you've completed your selection, click on Start Firefox. 

Google Chrome
       

Option 1: Using a New Incognito window

  1.  Open your Google Chrome browser. 
  2.  In the top-right corner, click on the three-dot menu icon and choose New Incognito window. 
  3.  In the New Incognito window, choose another Microsoft 365 account to log into. To make things easier, the keyboard shortcut for this is Ctrl + Shift + N. 


Option 2: Adding Profiles

  1.  Open a new Google Chrome browser window. 
  2.  On the top right of the toolbar click on the image to see user profiles. 
  3.  You will then have three options: Choose an existing profile, set up a guest profile, and add a profile. 
  4.  Click on + Add. 
  5.  You will then be prompted to Sign in or Continue without an account. Choose Continue without an account. 
  6.  The next page lets you name the profile and customize the way your browser profile looks. Color coding profiles is an easy way to make sure you're in the correct profile. 
  7.  Once you've finished naming the profile and picking its color, put a tickmark on Create a desktop shortcut if you want a Google Chrome shortcut for this specific profile to appear on your desktop. Once you've made your selection, click Done.