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Charlie_123's avatar
Charlie_123
Copper Contributor
May 08, 2023

Token error when trying to see free/busy times in Outlook 2016

Hi, we have a federation trust with another company and want to see the free/busy times in each others Outlook calenders.

 

From our four Exchange Servers it only works, if the user mailbox is located on a certain one, the other three are causing a token error when trying to access the calenders within Outlook 2016. The other company runs Office 365.

 

Federation Trust failed with Error:

Id         : TokenRequest

Type       : Error

Message    : Failed to request delegation token.

 

There don't seem to be any network issues. What could solve the issue? It has not worked before.

 

Thanks in advance!

2016
Exchange Server
office 365

3 Replies

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  • Andres-Bohren's avatar
    Andres-Bohren
    Steel Contributor
    May 11, 2023
    Seems to me that some servers might not access the Internet.
    Check Proxy Server Settings
    Get-ExchangeServer | ft Name, *Proxy*
    Netsh winhttp show Proxy

    Regards
    Andres
  • mderooij's avatar
    mderooij
    MVP
    May 10, 2023

    What does Test-FederationTrust -Verbose say?
    Try Get-Federationtrust | Set-FederationTrust –RefreshMetadata to refresh the certificate a.o.

    • Charlie_123's avatar
      Charlie_123
      Copper Contributor
      May 11, 2023
      Thanks, we have tried this, but it did unfortunately not solve the problem.

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