Workaround for Non-English Characters in User Principal Names (UPNs) in Power Automate AD Account Creation

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Posted on by Bambula

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Hey everyone,

I'm running into an issue while creating Active Directory (AD) user accounts using Microsoft Power Automate. The problem is that the User Principal Name (UPN) field only accepts standard English characters (no Š, Đ, Č, Ć, Ž, etc.). This is causing problems because I need to generate UPNs based on users' names, which often include these Croatian characters.

Has anyone found a good workaround for this? I'm looking for a way to either:

Translate: Automatically translate Croatian characters into their English equivalents (e.g., "Š" to "S", "Đ" to "Dj") before creating the UPN.
Alternative UPN Format: Find a way to structure the UPN that doesn't rely solely on the user's name but still uniquely identifies them.

Any suggestions, code snippets, or examples of how you've solved this would be greatly appreciated!

Thanks in advance!

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Nived_Nambiar 18,136 Super User 2026 Season 1 on at

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Hi @Bambula

I am agreeing with your first 2 approaches, based on that i can suggest solutions

1. Translate- This would be a good approach, I could see there are translation actions in Power automate that can help to convert these languages to english.

Other approach may be crazy is to create a prompt in AI Hub where you will create a prompt which accepts the Croatian format sentence and gives back English formatted ones

I have created a custom prompt like this

Prompt: You will be given sentences in Croatian. Your task is to convert each sentence to its English transliterated format by replacing specific Croatian letters with their corresponding English letters. This will be crotian sentence- Input: A sentence or a list of sentences in Croatian. Output: The transliterated English format of each sentence. Example: Input: "Čovjek jede štrudlu." Output: "Covjek jede strudlu." Input: "Želim posjetiti Zagreb." Output: "Zelim posjetiti Zagreb." Need english formated sentence as output, no other extra words /sentences

This will be created in AI Hub and then use the Create Text with GPT actions to where we will be passing crotian sentence and gives us an output of english formatted data.

For more details on how to use this action and creating AI prompt- refer this blog> https://nivednambiar.wordpress.com/2024/03/25/excel-document-summarizer-using-power-automate-and-gpt-actions/

2. Alternative UPN Format > For this approach- what i could think is of using Guid() expression which returns unique identifier, This expression can be written like below

Hope it helps !

Thanks & Regards,
Nived N 🚀

LinkedIn: Nived N's LinkedIn
YouTube: Nived N's YouTube Channel
Blog: Nived Nambiar's Blogs

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Bambula 169 on at

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Hi @Nived_Nambiar ,

Thank you for your detailed and helpful response! I appreciate you sharing the translation and GUID approaches.
Unfortunately, we don't have AI Hub available in our company's environment, so I had to find a different solution. I ended up using a similar workaround to the one you suggested for translation, directly incorporating the character replacement logic into a variable within my flow:
@{replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(body('Get_item')?['FirstName'],'Š','S'),'š','s'),'Đ','Dj'),'đ','dj'),'Č','C'),'č','c'),'Ć','C'),'ć','c'),'Ž','Z'),'ž','z'),'Dž','Dz'),'dž','dz')}
This seems to be working well for now.

Thanks again for taking the time to help out!

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Nived_Nambiar 18,136 Super User 2026 Season 1 on at

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Hi @Bambula

Good to know issue got resolved !

Thanks & Regards,
Nived N 🚀

LinkedIn: Nived N's LinkedIn
YouTube: Nived N's YouTube Channel
Blog: Nived Nambiar's Blogs

🔍 Found my answer helpful? Please consider marking it as the solution!
Your appreciation keeps me motivated. Thank you! 🙌

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