Problem accessing the Exchange on-prem calendar from Microsoft Teams

Question

Hello Teams Community,

Please i need your help on this issue.

We have problems accessing the Exchange calendar from Microsoft Teams for users with the mailbox still on Exchange 2016 on-premises.

The Exchange hybrid connectivity is set up and we synchronize al users with AAD Connect. A user migrated to Exchange online can see it’s a calendar from Microsoft Teams.

Because the Hybrid server is configured on another URL, we’ve changed the TargetSharngEpr on the OrganizationRelationship and IntraOrganizationConnector to match the Hybrid server URL.

After this change the Free/Busy started to work from a migrated mailbox to an on premises mailbox.

Here is attachment:

Answer 1

Hi @IBN ,

Considering that it's a public forum, I‘ve just edited the images you shared above by removing all domain names involved.

We have problems accessing the Exchange calendar from Microsoft Teams for users with the mailbox still on Exchange 2016 on-premises.

Could you share some more details about the symptom like is there any error message or do you mean these users just cannot see the Calendar tab in their Team client?

Besides, please go through the document below and make sure all requirements listed have been met:
Requirements to create and view meetings for mailboxes hosted on-premises

Furthermore, you can refer to the following blog and see if the troubleshooting steps can be helpful:
Microsoft Teams and on-premises mailboxes: Part 2 - Teams Calendar App Troubleshooting

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