All seems great, right? Well, that would be the case if all the steps were accurate...
To start, the PowerShell commands in step 1 to enable OAuth on the Dynamics 365 Server just do not work. The first three will work fine but upon execution of the 4th to actually set the change, it will throw an error. Instead, use this syntax to accomplish the same thing:
Add-PSSnapin Microsoft.Crm.PowerShell
$ClaimsSettings = Get-CrmSetting -SettingType OAuthClaimsSettings
$ClaimsSettings.Enabled = $true
Set-CrmSetting -Setting $ClaimsSettings
Afterwards, run Get-CrmSetting -SettingType OAuthClaimsSettings and you should see enabled set to "True" as shown below.
Moving onward to step 3 in the process where we register the Power BI Desktop OAuth 2.0 client with ADFS. You will notice in the instructions that it states "open a Windows PowerShell window and run the following PowerShell command on the PC where you are running Power BI Desktop". This is simply wrong. The "Add-AdfsClient" command is for... ADFS. Shocking, I know. So ignore the statement about the PC running Power BI and run the command provided on your ADFS server instead. Luckily, this one is correct and works. If you run Get-AdfsClient afterwards, you will see the addition of Power BI.
One last helpful tip - When copying commands from websites (even here), I always recommend pasting into Notepad before bringing them where they need to be executed (e.g. SSMS, PowerShell, etc...). This will get rid of any problematic formatting.
That's really it from a server perspective. Best of luck!
