Since a few days I get the

code message stat
40104 Missing request timestamp FAIL

on pretty much every function I run against the Admin API. After some digging I found out that you have to set the regional format to English (United States) for your invoke-request function to work.
Maybe you consider to update your XDuoDate Get function to also convert days and so on to English if possible.

My regional format was set to German where Wednesday is Mittwoch and therefore $XDuoDate contained Mi, 14...

I'm not able to authenticate to the Duo service. I run Set-DuoApiAuth, but no matter what I try I'm not able to get information.

What application in Duo is required? I have the Auth API and Duo API applications both setup and neither seem to work as expected. When you run the Set-DuoApiAuth the "Type" what's the difference between Accounts, Auth, and Admin. Does it matter which one you use since it appears you can run any command with any type. Does the type correspond to different applications in Duo?

Depending on the Duo app and type I get a variety of error messages either Access forbidden or Invalid identity in request credentials.

Happen to have a suggestion on how to encrypt the integration key?

When attempting to get a create new user with New-DuoUser in the admin API, it seems to return an error referencing aliases. I was able to use Get-DuoUsers just fine. Specifying my own aliases for the user didn't seem to matter either.

code : 40002 message : Invalid request parameters message_detail : aliases stat : FAIL

Here is what I was running:

Set-DuoApiAuth @Auth

$username = "lukeskywalker"
$fullname = "Luke Skywalker"
$emaill = "[email protected]"
$aliases = @{alias1='goldleader'; alias2='redleader'}

New-DuoUser -Username $username -FullName $fullname -Email $email

Hi.

Is it possible to add the functionality to upload Device Identifiers for Trusted EndPoints? This would be an epic addition to this script.

Do you have plans to finish implementing v2 API support? For example, we were able to get Get-DuoIntegrations to work by simply changing the Path and SignatureVersion

Is this something you could implement so that we don't have to modify it on our end?

Great module by the way!