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Error connecting Dynamics 365 (on-prem) with Exchange Online

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Posted on by Sudeep

We are trying to connect our Dynamics 365 on prem version with exchange online.

The following steps are complete

1. IFD is done

2. Server side sync was completed successfully and tenant id being generated sucessfully.

But when i am trying to create an email profile, i get the error which says "The certificate used for S2S authentication is not installed"

Can you please let me know what i am missing?

When i try to do "Test Connection" it fails as well. Below is the error trace i get

*********************
Message from 365::
*********************
Aquiring Token from ACS has failed. Please check if your tenantId is specified correctly in your Email Server Profile, and make sure your Exchange and CRM are under the same tenant

Categories:

Email and Office Integration

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Andreas Cieslik 9,267 on at

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Looks like you missed a step along the way in your configuration...

There is an excellent guide here:

us.hitachi-solutions.com/.../setup-dynamics-365-server-side-synchronization-premise-exchange-online

versus the official guide:

technet.microsoft.com/.../mt703269.aspx

Please review your steps.

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Sudeep 75 on at

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Andreas,

I used the exact same link you provided to perform all the steps. All the steps were success till the step where it tells me to create an email profile. On that window i get an error as attached. Also when i try to test the connection all 3 points fail as attached.

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Andreas Cieslik 9,267 on at

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Have you checked this:

community.dynamics.com/.../276990

community.dynamics.com/.../207762

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Sudeep 75 on at

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Yes. Checked those ones as well. But did not work.

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Romulo Duarte 10 on at

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Hi, how are you?
did anyone manage to solve it? I am also having the same problem!

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Romulo Duarte 10 on at

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Were you successful, my friend?

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TheErroristt 35 on at

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Anyone succeeded to fix this issue??

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JaydenPerez17 112 on at

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Hi Sudeep and whomever comes across this issue seeking hope.

I have been bashing my head against the wall encountering the same symptoms and the documentation led me around the bend.

In my case the solution happened to be a quite simple one, found the answer here:

CRM Hybrid Configuration Error: "Aquiring [sic] Token from ACS has failed." | Open Forum (connectedcommunity.org)

The kicker in our case required the Certificate being used in IFD to be installed on the servers running the Async service, effectively any servers running Backend Roles.

Import the certificate, Restart the Async services (Production and Maintenance), Test Connection success immediately.

If that helps anyone i'm glad, it was a frustrating one.

Good hunting,

Jayden.

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