Jorge's Quest For Knowledge!

All About Identity And Security On-Premises And In The Cloud – It's Just Like An Addiction, The More You Have, The More You Want To Have!

(2016-12-12) Azure AD Connect Upgrade Displays Error While Executing “Configure AAD Sync Task”

Posted by Jorge on 2016-12-12


During the Azure AD Connect upgrade, you may end up with the error below:

Configure AAD Sync

An error occurred executing Configure AAD Sync task: The given key was not present in the dictionary

image

Figure 1: Error During The Upgrade Of Azure AD Connect

The log file does not really give you a hint

The solution? Just click [Retry]

When googling on the internet you may find the following blog post:

The errors you see there are related to connectivity to Azure AD, either directly or through a proxy.

If you do not use a proxy, but rather have a direct connection to the internet, you do not need to configure the machine.config file.

If you do use a proxy make sure to configure the machine.config file as recommended in Prerequisites for Azure AD Connect

I know of an Azure AD Connect installations that:

  • Connect to Azure AD directly and without any adjustment in the “machine.config” file
  • Connect to Azure AD through a proxy and with any adjustment in the “machine.config” file

…that show the error in figure 1

Cheers,
Jorge
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One Response to “(2016-12-12) Azure AD Connect Upgrade Displays Error While Executing “Configure AAD Sync Task””

  1. Roger said

    Yeah clicking “Retry” worked! So strange!
    Cheers anyway.

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