Outlook Android App error occurred during authentication. Please try again later.

Thanks for your reply KING142. As much as I wish you could connect, it's a relief to rear that someone else has tried all the steps suggested but still cannot get it to work correctly. This is really a "conundrum" for me because I can use Outlook on my Mac and on my Samsung S24 to work, but I keep getting that error on my Samsung S9 tablet.

Sorry to hear you’re experiencing the same frustration, as this wasted hours of my day! For me, setting up a new Samsung phone, the solution posted by a user worked, as it appeared Outlook was trying to authenticate with my new Samsung account’s password. Removing the Samsung and MS accounts, uninstalling Outlook, restarting the phone and reinstalling Outlook worked for me. This is really something MS, Samsung and Google/Android need to get together to sort out as it sounds like the standard MS reply is to check the internet connection and email address!

Thomas,

The part about the "server name" and "domain name" wasn't clear to me, what am I supposed to enter for each of them? No questions about the "Username".

• Thanks

"we put the "server name" skip the "domain name" and for the "Username" Just put the users email address"

TL;DR - somehow adding three accounts at once (one outlook, and two office365) finally got my main account up and working on my mobile

I think I may have found a way round this. I have exactly the same problem, tried exactly the same solutions, including a different office365 account. Came across this thread, got depressed, and realised I would have to return my new phone to Amazon. Within that process I did telephone Samsung, and they tried really hard, but still failed. So I have requested a return (which won't now happen 'til after the weekend).

BUT, I am an inveterate fiddler, and I tried the new account button, and created a new ?@outlook.com account at that worked. So having broken past the opening screen, I then tried adding my main Office365 account, and (as might be expected) failed.

However, in going into look at the new account on my desktop, it presented me with a QR code to download mobile outlook to my phone. So I thought it was worth a go. So I uninstalled the old one (again) and loaded a new Outlook App via the QR code. Which offered me three pre-existing accounts I could add (the new outlook, my main Office365, and another office 365 that I had been trying in case it was my main account that was the problem).

Selecting my main account, and deselecting the other two gave me the same error message and returned me to the initial screen. But on a whim, I tried again, and kept all 3 accounts selected. I got the error message again, but just for one of the accounts - the outlook.com account got through (as I might expect) but so did my main Office365 account!!!

Frankly, while the account seems to be fine, the process of getting there seems a bit of a fluke and potentially fragile. So I tried it again, and it worked again (although, I have no idea why the other 365 account is being rejected). So I now need to see if I can cancel my return.

Sorry, bit long winded, but I figured if anyone is going to take the risk in following my footsteps, a fuller explanation might help (both confidence and repeatability). It may also help if anyone at Microsoft (or Samsung) is seriously looking for clues and insights into what is actually going wrong for the rest of us??? Hope it helps.

I have the same issue and have tried all suggestions, without success.