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Xotaz-4957 avatar image
2 Votes"
Xotaz-4957 asked PeninsulaPoolSupplies-3023 commented

Error 500: Repeating redirects detected - Outlook Online

Trying to access a mailbox through the Outlook online version.
Been trying to find a working solution on the internet for 3 days now.

Seems only non-chromium browsers work (Such as IE).
Doesn't work on Edge, Chrome, Firefox, Brave etc.

This issue only just appeared last Friday and didn't exist before.
Haven't changed any settings whatsoever on the account.

Account has Microsoft 365 Business Standard License

I've tried:

  • Incognito/InPrivate

  • Clearing cookies/site data

  • Made sure system time was correct and in sync

  • On MS Word > File > Info > Access this account on the web

  • Updated Browsers

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Considering your issue may be more related to Microsoft 365 account in outlook for web, please kindly understand here we mainly focus on general issue on Outlook for windows, so I modified your tag, thanks for your understanding and hope your issue would be resolved soon.

0 Votes 0 ·
JadeLiang-MSFT avatar image
0 Votes"
JadeLiang-MSFT answered

Hi @Xotaz-4957,
Welcome to our forum.
For your error, I have researched a lot and found a similar thread, which mentioned changing the data/time settings in your computer may work for it, please check if it could also be helpful to you.

If that's invalid, please kindly understand here we mainly focus on general issue about Outlook desktop client,considering your issue may be more related to your O365 account in browser, in order to solve it better, it's suggested to post a new thread in this dedicated forum.

The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thanks for your understanding and hope your question will be resolved soon.


If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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TuanPhamMinh-8038 avatar image
6 Votes"
TuanPhamMinh-8038 answered PeninsulaPoolSupplies-3023 commented

If your user is assigned too many roles, the Office portal can lose its cool and get into an endless redirect loop. By ‘too many roles’, I mean your Microsoft 365 user account has been assigned too many admin roles. Fortunately, this is an easy issue to resolve — depending upon how your Microsoft 365

  1. Click ‘Manage roles’ under the heading ‘Roles’

  2. Remove all admin roles other than ‘Global Administrator’ and click ‘Save changes’

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Thank you TuanPhamMinh-8038, this has resolved the issue. It appears that the older Office 365 admin user accounts had as many as 40+ admin roles. Once I removed all of these roles (except the Global Admin) role, I was able to assign all of the new 7 admin roles, to give the user full admin access.

1 Vote 1 ·

That also helped me a lot. Thank you @TuanPhamMinh-8038

0 Votes 0 ·

This did it for me.
Thanks for the solution

0 Votes 0 ·

Than you this was my issue. The previous admin when creating my account selected EVERYTHING. Thank you for your input!!!

0 Votes 0 ·

You made my day. Thanks a lot!

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RezaMolavi-6623 avatar image
0 Votes"
RezaMolavi-6623 answered RezaMolavi-6623 published

TuanPhamMinh,
Thank you very much. You solved a problem no Microsoft tech has been able to solve for a year. I salute you.

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