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Rigs33's avatar
Rigs33
Copper Contributor
Apr 07, 2020
Solved

Teams Calendar Button missing - exchange 2010 + Exchange 2016 hybrid on-prem

Hello Tech community,   As you can see in the object, I have one Exchange 2010 sp3 RU22 and one Exchange 2016 CU12  (same forest). The 2016 is my hybrid server, all mailboxes are hosted on Exchang...
microsoft teams
  • Rigs33's avatar
    Rigs33
    Jul 14, 2020

    Hello fishizza,

     

    I had a long troubleshoot session with a Microsoft Exchange Escalation Engineer, it appears that the Teams Rest/API protocol  is not compatible with mailboxes created in Exchange prior to 2016 CU3.
    Finally, we migrated mailboxes directly to Office 365.

     

     

fishizza's avatar
fishizza
Copper Contributor
Jul 14, 2020

Rigs33 

 

Did you ever find a solution here?  I have a very similar problem with an onpremise Exchange 2013 and 2019 with hybrid setup between Online and 2019 box.  Moving users from onprem 2013 to 2019 is not getting me the calendars button in Teams for those users

Rigs33's avatar
Rigs33
Copper Contributor
Jul 14, 2020

Hello fishizza,

 

I had a long troubleshoot session with a Microsoft Exchange Escalation Engineer, it appears that the Teams Rest/API protocol  is not compatible with mailboxes created in Exchange prior to 2016 CU3.
Finally, we migrated mailboxes directly to Office 365.

 

 

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