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

Sree 1,966 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

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Accepted answer
  1. Andy David - MVP 109.8K Reputation points Microsoft MVP
    2021-11-24T18:20:07.2+00:00

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