Internet Explorer:
1. Open Internet Explorer to log into one Office 365 account.
2. Click Tools option in top toolbar.
3. Hover your mouse over the Safety option and click InPrivate Browsing.
4. After the InPrivate Browsing window opens, log into your other Office 365 account.
5. The keyboard shortcut to open an InPrivate Browsing window is Ctrl, Shift, and the P key.
Mozilla Firefox:
1. Open Mozilla Firefox to log into one Office 365 account.
2. Open the menu (the three lines in the top right corner) and select New Private Window.
3. After the New Private Window opens, log into your other Office 365 account.
4. The keyboard shortcut to open a New Private Window is Ctrl, Shift, and the P Key.
Google Chrome:
1. Open Google Chrome to log into one Office 365 account.
2. Open the menu (the three lines in the top right corner) and select New Incognito window.
3. After the New Incognito window opens, log into your other Office 365 account.
4. The keyboard shortcut to open a New Incognito window is Ctrl, Shift, and the N Key.
Safari:
1. Open Safari to log into one Office 365 account.
2. Select the File option in the top left corner and select New Private Window.
3. After the New Private window opens, log into your other Office 365 account.
4. The keyboard shortcut to open a New Private window is Control, Option, and the P key.