I would like to use multiple mail accounts in the online version of Office 365 (Mail section of login.microsoftonline.com). At the moment, I can just log in with one account. If I want to check the mail belonging to an other account, I have to log off and log in with the other account. It is not possible to open two different accounts: when you open login.microsoftonline.com in a second tab, it automatically logs in to the account that was already open in a first tab.
Are there any alternatives to circumvent this situation (online)?
Office 365 – Use Multiple Mail Accounts Simultaneously
outlook-web-access
Related Solutions
In case others find this, I think I just found a solution (from this blog post) that lets you force the browser back to showing the Light version of OWA with 40-some messages listed at one line per, instead of the ridiculous modern tile version where you see 4. Directly after the /owa/ part of the URL you are using, paste in ?exsvurl=1&layout=light&wa=wsignin1.0. So if you are getting your webmail on office365, your URL will look like this:
https://outlook.office365.com/owa/?exsvurl=1&layout=light&wa=wsignin1.0
Edit: Testing it a bit, it seems like the only necessary part of that is ?layout=light ... So try:
https://outlook.office365.com/owa/?layout=light
When you click the checkbox to select all the emails the email content window displays a menu which includes the buttons of options for the selected emails which has a header counting the number of selected emails. You can find the selection url for all the emails just below this header which reads as "Select everything in your Inbox folder".
Best Answer
A possible - though not elegant - solution is to open each account in a different web browser (e.g. Chrome and Firefox).