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sandiven1154's avatar
sandiven1154
Copper Contributor
Jan 15, 2026

Teams calendar for exchange on prem users not working

Hello 
I am having issues to make  Exchange On prem users use  Calendar on teams.
Initially Client autodiscover was blocked externally but they added a cname and open flows but I am still having issues to makecalendar on teams work
HCW as passed and new hybrid dedicated app was used 

any help is welcome

 

exchange online
Exchange Server
hybrid
teams

1 Reply

  • Scott_Schnoll's avatar
    Scott_Schnoll
    Brass Contributor
    Jan 16, 2026

    For Teams to show calendars, the user must have an Exchange Online mailbox or be in a properly configured Exchange Hybrid with OAuth / Modern Auth working.  Is that the configuration you're using?

    You can do a quick test to see if things are configured correctly by running the following command (replace the placeholder user with your own user account):

    Test-OAuthConnectivity -Service EWS -TargetUri https://outlook.office365.com/EWS/Exchange.asmx -Mailbox email address removed for privacy reasons

     

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