Exchange Server 2016 Version 15.1 running a Hybrid environment; issues with syncing with office 365

Sree 1,971 Reputation points
2021-11-24T18:05:56.607+00:00

after security patch a subdomain was added in the url, but we were able to correct it.
Redirect for Outlook Web Access does not work (inside and outside the network)- when I accesses webmail I enter my credentials and after selecting login, I receive an error message stating "Something went wrong"
When am trying to access portal.office.com login is successful.

able to access portal.office.com -> Outlook https://outlook.office.com/mail/inbox, if am copying the URL to another browser, I can connect to the account.
Only when am trying to access webmail I enter my credentials and after selecting login, I receive an error message stating "Something went wrong".

in hybrid environment
most users are on on-prem
redirect happens on on-prem
adfs issue with mailboxes on 365
we get error something went wrong
On checking the event logs:
Event ID 342, AD FS, Token Validation failed
Event ID 1000, AD FS

Microsoft Exchange Online Management
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Exchange Server Management
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Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
1,886 questions
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Accepted answer
  1. Andy David - MVP 141.5K Reputation points MVP
    2021-11-24T18:20:07.2+00:00
    1 person found this answer helpful.

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